Each PCB board is basically composed of an aperture, drill layer, circuit layer, solder resist layer, character layer, in the CAM350, each layer will be loaded in different color zones separately, in order to facilitate the operation. The following is the basic steps of PCB CAM production.
1. Import file
First automatically import files (file-->import-->autoimport) and examination data are complete, the alignment layers (edit-->layers-->align) and set origin position (edit-->change-->origin-->datum coordinate), the layer arrangement (edit-- >layers-->reorder) according to a certain order, the layer would be useless to delete edit-->layers-->reorder.
2, Treatment of drilling
When customers did not provide drill files, you can use converted into flash (utilities-->draw-->custom, utilities-->draw-->flash-->interactive) turn into borehole drilling for editing, utilities-->gerber to drill) aperture position;
Then inspect the smallest hole size, hole edge and the edge of the hole or slot minimum spacing (analysis-->check drill), the edge of the hole edge and forming minimum distance (info-->measure-->object-object) whether meet the process capability.
3, line processing
The first measurement of minimum diameter, line spacing (analysis-->drc), to see if they meet the process capability. Then the wire diameter compensation according to the thickness of the copper foil board type PC and substrate (edit-->change-->dcode), check the line pad has no offset relative to the drill hole (if pad has edit--> layers-->snap pad to, using the drill command; if drilling is biased the use of edit-->layers-->snap drill, to pad, pad ring) command line is large enough (analysis-->drc), and npth line hole, groove edge, forming edge distance meets the pad requirements of.Npth production line hole (edit-->delete). Then whether to cancel the DRC examination after the completion of the above lines and lines, and pad, whether spacing pad and pad meet the production requirements.
4,Anti welding process
Check solder and circuit pad matching (analysis-->drc), solder and line spacing, plates welded with the circuit pad spacing (line and soldermask copy to a layer, then analysis-->drc command to check this layer), preventing electrode from the minimum width, npth whether have sizes solder block (add-->flash).
5, Word processing
Check the text line width (info-->report-->dcode), height (info-->measure-->point-point), diameter hollow, text and line pad spacing, text and shaping of the edge distance, text and fishing hole or slot spacing, text and not eat tin PTH pitch whether or not to meet the requirements of the production. Ran after according to customer requirements add UL Mark and date code marking.
6, Work with contiguous edge processing
According to the specified contiguous contiguous edit-->copy, processing of the side. Then add AI hole drilling for editing, add-->drill hit), the positioning hole, optical, customer material number (add-->text), Yang Xuan material number. Need V-CUT to guide the V-CUT angle (edit-->line change-->fillet, if need to fillet with the following command: edit-->line change-->chamfer. Some of the also requires et chapter, V-CUT test points, broken drill hole, the second the drilling plates stay test line and pad, the identification mark etc..
7, Layout and process side of the production
According to the layout of the table on the layout of the layout, according to the production of standardized production process
8, The composite layer
peration: tables-->composites. according to the add increase a (name, bkg for setting the screen figure polarity (positive and negative), dark to multiply attributes (layer), clear negative attributes (reduced layer).
9, Output drilling and light drawing data
Cam finished recording the original film, the minimum line work piece size, line spacing and foil area (analysis-->copper area).
Learn more from China PCB manufacturer
Thursday, June 30, 2016
Tuesday, June 28, 2016
How to Solve the EMI Problem of Multi Layer PCB
There are many ways to solve the problem of EMI, modern EMI suppression method includes: using EMI inhibiting coating, the selection of appropriate EMI suppression of spare parts and EMI simulation design etc.. This paper from the most basic PCB layout of PCB layer stack in the control of radiation EMI and design skills discussion.
Power Bus
In IC power supply pin near arrange appropriate capacity of the capacitor, the IC output voltage jump faster. However, problems are not hereto. Due to the capacitance is limited frequency response characteristics, which makes the capacity not in the whole band generation clean driving IC output harmonic power. In addition, the transient voltage of power bus is formed in a decoupled path across the inductor will form a voltage drop, the transient voltage is the main common mode EMI interference source.
Electromagnetic Shielding;
From the signal go line, good hierarchical strategy should put all the signal wire is placed in a layer or a plurality of layers. These layers next to the power layer and ground layer. For the power, good hierarchical strategy should power layer and ground layer adjacent and power layer and ground stratigraphic distances as small, this is, we talk about the "layered" strategy.
PCB stack
What stacking strategies help to shield and suppress the EMI following a hierarchical stacking scheme assumes that the supply current flows in a single layer, a single voltage or multi voltage distribution in the different parts of the same layer.
3 Applications of Industrial Robots in the PCB Industry
The rapid rise of the automobile PCB industry
Sunday, June 26, 2016
FR4 PCB would never be beaten down by FR1
Fr4 PCB is mostly used in pcb manufacture. Fr4 pcb is mainly used in double side pcb or multilayer pcb. The cost is much expensive than Fr1. Nowadays more and more prodcut turns to use Fr1. Do you think Fr1 would go to replace the Fr4?
Obviously , the answer is no. Fr4 is more advanced material in products. People would consider the usage of the product to choose the suitable material. Although the price is main factor to effect the choice, fr4 has its special usage in the pcb production. Fr1 is used in very simple products. Actually, fr1 can be only used in single layer pcb. If you look into the products you may find that the electronic is more advanced and many of them is above 2 layers. Now the requirement of high technical,high density is in the current world. So fr4 would never be replaced by fr1.
Fr4 pcb has the following advantage:
Good mechanical strength and excellent workability, good mechanical properties, abrasion,acid and alkali.
Tuesday, June 21, 2016
3 Applications of Industrial Robots in the PCB Industry
As is known to all, the industrial robot the earliest is applied in automobile manufacturing industry, robot technology development up to now, the applied range so widely, the automotive industry is still industrial robots using higher density of a industry. Relative to the automobile production in the process of welding, spraying, handling, etc., the PCB industry requirements of robot accuracy to more high and relatively high complexity of work. Here we introduced three industrial robots are used in the case of PCB industry.
1.scara robot used in circuit board coil detection process
Complete set of testing equipment currently on the market almost no multilayer coil short circuit, much of this work relies on manual work, PCB board large aperture artificial board will be on the test device and open testing equipment, small aperture PCB board manual holding equipment (probe) to detect each coil can be done with the use of detection equipment. The SCARA robot baiting and para placement, complete testing on the aperture board all coils; for small aperture board, using a SCARA device is fixed on the end of the implementation of the probe, decided to use is to detect each coil probe, our equipment is effectively avoided the manual operation for small aperture and aperture coil or missed. Can significantly improve the detection efficiency compared with manual operation, and avoid the quality problem caused by omission.
2. delta robot used in small circuit board product assembly process
The FPC mounted disk is generally the use of artificial one by one to pick it up and put it plastic disk inside. Due to the FPC soft and thin when picking up very convenient, even experienced workers to complete the work efficiency is very low. Delta800 coupled with a visual system can from the FPC messy heap qualified picked up and in accordance with the requirements placed into trays inside, the effect is not inferior to artificial. Its speed can reach 60 pieces per minute, can replace artificial disc sorting device, thus saving the valuable labor resources, reduce the cost of the enterprise.
3. 6 axis industrial robot used in AOI testing process
AOI scanning machines rely on traditional manual imitation version, version and board, a worker control two sets of scanning machines, the monotonous work every day, and just making circuit boards will be good exudes a pungent odor of bring certain harm to the human body, AOI scanning machine from the infrared light is a stealth killer, all of the worker's health harm, the use of multi joint robot instead of artificial board for two sets of AOI, a turning plate and the receiving board, each class can be completed and more than 700 PCB hard, comprehensive efficiency can reach 1 /min (including AOI scanning time machine).
Industrial robot with the advantage of its high degree of automation, more and more to be applied in industrial production lines, with the innovation of the industrial robot technology robot in the process of high-speed production, the same can be to ensure high precision, which makes the robot can make a difference in the PCB industry.
Further Reading:
PCB Circuit Board Fabrication Process Flow
Advantage of Metal Core PCB
1.scara robot used in circuit board coil detection process
Complete set of testing equipment currently on the market almost no multilayer coil short circuit, much of this work relies on manual work, PCB board large aperture artificial board will be on the test device and open testing equipment, small aperture PCB board manual holding equipment (probe) to detect each coil can be done with the use of detection equipment. The SCARA robot baiting and para placement, complete testing on the aperture board all coils; for small aperture board, using a SCARA device is fixed on the end of the implementation of the probe, decided to use is to detect each coil probe, our equipment is effectively avoided the manual operation for small aperture and aperture coil or missed. Can significantly improve the detection efficiency compared with manual operation, and avoid the quality problem caused by omission.
2. delta robot used in small circuit board product assembly process
The FPC mounted disk is generally the use of artificial one by one to pick it up and put it plastic disk inside. Due to the FPC soft and thin when picking up very convenient, even experienced workers to complete the work efficiency is very low. Delta800 coupled with a visual system can from the FPC messy heap qualified picked up and in accordance with the requirements placed into trays inside, the effect is not inferior to artificial. Its speed can reach 60 pieces per minute, can replace artificial disc sorting device, thus saving the valuable labor resources, reduce the cost of the enterprise.
3. 6 axis industrial robot used in AOI testing process
AOI scanning machines rely on traditional manual imitation version, version and board, a worker control two sets of scanning machines, the monotonous work every day, and just making circuit boards will be good exudes a pungent odor of bring certain harm to the human body, AOI scanning machine from the infrared light is a stealth killer, all of the worker's health harm, the use of multi joint robot instead of artificial board for two sets of AOI, a turning plate and the receiving board, each class can be completed and more than 700 PCB hard, comprehensive efficiency can reach 1 /min (including AOI scanning time machine).
Industrial robot with the advantage of its high degree of automation, more and more to be applied in industrial production lines, with the innovation of the industrial robot technology robot in the process of high-speed production, the same can be to ensure high precision, which makes the robot can make a difference in the PCB industry.
Further Reading:
PCB Circuit Board Fabrication Process Flow
Advantage of Metal Core PCB
PCB Wiring Principle
PCB board is based on the PCB circuit design, so PCB line layout becomes particularly important, the general layout of the PCB line needs to comply with the following principles:
1. According to the electrical performance of a reasonable partition, is generally divided into: digital circuit area (that is, afraid of interference, and interference), analog circuit area (afraid of interference), power drive area.
2. Complete the same function of the circuit, should be placed close to the place, and adjust the components to ensure that the connection is the most concise; at the same time, adjust the relative position between the functional blocks to make the connection between the functional blocks of the most concise;
3. For the quality of components should consider the installation location and installation intensity; heating elements should be placed separately with the temperature sensitive components, it is necessary to consider the thermal convection;
4. I/o driver as close as possible to the printing plate edge near the lead connector;
5. The clock generator (such as: crystal oscillator or clock oscillator) device should be as close as possible to use the clock.
6. In each integrated circuit between the power input pin and ground, the need to add a decoupling capacitor (usually with a good high frequency performance of the monolithic capacitor); circuit board space is more dense, but also in a few integrated circuits around the addition of a tantalum capacitor.
7. Relay coil to add discharge diode (1N4148 is ok);
8. Layout requirements should be balanced and orderly density, not top-heavy or a heavy head.
Strict adherence to the principles of PCB wiring is the basis for the design of the best PCB board.
Further Reading: Types of PCB Boards
1. According to the electrical performance of a reasonable partition, is generally divided into: digital circuit area (that is, afraid of interference, and interference), analog circuit area (afraid of interference), power drive area.
2. Complete the same function of the circuit, should be placed close to the place, and adjust the components to ensure that the connection is the most concise; at the same time, adjust the relative position between the functional blocks to make the connection between the functional blocks of the most concise;
3. For the quality of components should consider the installation location and installation intensity; heating elements should be placed separately with the temperature sensitive components, it is necessary to consider the thermal convection;
4. I/o driver as close as possible to the printing plate edge near the lead connector;
5. The clock generator (such as: crystal oscillator or clock oscillator) device should be as close as possible to use the clock.
6. In each integrated circuit between the power input pin and ground, the need to add a decoupling capacitor (usually with a good high frequency performance of the monolithic capacitor); circuit board space is more dense, but also in a few integrated circuits around the addition of a tantalum capacitor.
7. Relay coil to add discharge diode (1N4148 is ok);
8. Layout requirements should be balanced and orderly density, not top-heavy or a heavy head.
Strict adherence to the principles of PCB wiring is the basis for the design of the best PCB board.
Further Reading: Types of PCB Boards
Monday, June 20, 2016
The rapid rise of the automobile PCB industry
Automatic driving and new energy car comes at a time when the hot market, driven by leading automotive PCB manufacturers full orders. At the same time, because of the strict audit of automobile industry chain, the stability requirements are higher, so automotive electronics with respect to consumer electronics.
In order to understand the current PCB industry development environment help PCB manufacturers and equipment manufacturers to adapt to the trend of development of the industry, enhance the competitiveness of enterprises, promote industrial upgrading, 21 to 23 June 2016, Nepcon West China of 2016 will be in Chengdu Century City New International Convention and Exhibition Center was held. NEW PCB exhibition the exhibition, will undoubtedly become the PCB of exhibitors and visitors a professional event.
Automatic driving and new energy vehicles to promote the use of a substantial increase in the amount of PCB car
With the traditional car after ADAS gradually to the automatic driving transition, and new energy automobile promotion, continuously improve the permeability of automotive electronics, car PCB is used more and more widely. It is expected that future with mature technology and popularization, to raise the level of the car it, various, more and more feature rich, practical, and by high-end type continuous to middle and low penetration.
Millimeter wave radar spawned a huge demand for high frequency PCB car
The automobile millimeter wave radar is in a high-speed development, expected future bicycle by the average number of millimeter wave radar will continue to grow, demand for automotive radar PCB is also growing rapidly. And high-frequency radar circuit on the PCB plate, the manufacturing process have higher requirements. Therefore, automotive radar PCB will bring higher value.
Because of the special working environment of automobile, safety and high current requirements, the PCB reliability, environmental adaptability requirements are very stringent. According to chin-poon industrial chairman Huang Weijin introduction, zero defect rate is a basic requirement for suppliers of international companies, it also determines the ability in vehicle field. Because the car with PCB PCB high barriers to entry, car manufacturers will not replace certified suppliers. Therefore, once the firm can smoothly into the international.
At present, in the western region of China adaptation domestic PCB industry consolidation wave, vigorously to undertake the transfer of industries gathered, in land concessions and preferential taxation, free of charge on behalf of the recruitment of eastern enterprises produced a great attraction, the PCB industry in the west of flowering momentum appeared. At the same time with Sheng electronics industry to digital, intelligent production technology needs Yu Jiawang, the western region is gradually growth for China's manufacturing industry competition.
In order to understand the current PCB industry development environment help PCB manufacturers and equipment manufacturers to adapt to the trend of development of the industry, enhance the competitiveness of enterprises, promote industrial upgrading, 21 to 23 June 2016, Nepcon West China of 2016 will be in Chengdu Century City New International Convention and Exhibition Center was held. NEW PCB exhibition the exhibition, will undoubtedly become the PCB of exhibitors and visitors a professional event.
Automatic driving and new energy vehicles to promote the use of a substantial increase in the amount of PCB car
With the traditional car after ADAS gradually to the automatic driving transition, and new energy automobile promotion, continuously improve the permeability of automotive electronics, car PCB is used more and more widely. It is expected that future with mature technology and popularization, to raise the level of the car it, various, more and more feature rich, practical, and by high-end type continuous to middle and low penetration.
Millimeter wave radar spawned a huge demand for high frequency PCB car
The automobile millimeter wave radar is in a high-speed development, expected future bicycle by the average number of millimeter wave radar will continue to grow, demand for automotive radar PCB is also growing rapidly. And high-frequency radar circuit on the PCB plate, the manufacturing process have higher requirements. Therefore, automotive radar PCB will bring higher value.
Because of the special working environment of automobile, safety and high current requirements, the PCB reliability, environmental adaptability requirements are very stringent. According to chin-poon industrial chairman Huang Weijin introduction, zero defect rate is a basic requirement for suppliers of international companies, it also determines the ability in vehicle field. Because the car with PCB PCB high barriers to entry, car manufacturers will not replace certified suppliers. Therefore, once the firm can smoothly into the international.
At present, in the western region of China adaptation domestic PCB industry consolidation wave, vigorously to undertake the transfer of industries gathered, in land concessions and preferential taxation, free of charge on behalf of the recruitment of eastern enterprises produced a great attraction, the PCB industry in the west of flowering momentum appeared. At the same time with Sheng electronics industry to digital, intelligent production technology needs Yu Jiawang, the western region is gradually growth for China's manufacturing industry competition.
The new iPhone Circuit Board will Introduce the Class Board Technology
Set of micro network news on June 20, according to Taiwan media reports, Apple may be iPhone substantial revision cycle extended from the current 2 years to 3 years, rumors 2017 launched a substantial revision of the models may make major changes in appearance, the OLED display screen, may also staying high performance motor to realize complex tactile vibration.
The extension of the revision cycle will have a significant impact on suppliers in Japan, Taiwan and other parts of Asia, as these companies are highly dependent on iPhone.
Wu Jian, chairman of Taiwan PCB manufacturers Huatong revealed that have large customers 2017 the annual new phones will change the class loading plate "technology, for suppliers bring new challenges, is thought to be referring to the apple.
Market had been rumors, apple is seeking can replace the existing HDI (high density circuit board) of the class loading plate "technology, in order to adapt to the smartphone adoption of SIP (system level package) trend. With the SIP is equipped with components of the increase in the number of over limit load of HDI, Apple hopes to further introduce" class load board material application.
Wu Jian says frankly, the global smart phone market size each year about 20 billion branch, is close to saturation, the future will not appear too big change, also won't have significant growth. In order to meet the needs of customers Huatong has begun to layout the load board production line, have the confidence to grasp the business opportunities.
On 17 Huatong shareholders meeting, Wu Jian said that because of the infrastructure in place, strategy is in the right direction, 2015 years of successful paid out beautiful transcripts, revenue and profit all over the past few years have considerable growth. Especially in smart phones, although revenue growth is not a special Torgovnik Bie Mingxian, but because yield increase, the contribution to the company profit is not small.
Huatong last year net income after tax 28.67 million yuan, annual growth rate reached 44.3%, conversion per share after tax net income 241 yuan, hit a new high of nearly eight years, the shareholders today will cash dividend per share allotment by 1 yuan
The extension of the revision cycle will have a significant impact on suppliers in Japan, Taiwan and other parts of Asia, as these companies are highly dependent on iPhone.
Wu Jian, chairman of Taiwan PCB manufacturers Huatong revealed that have large customers 2017 the annual new phones will change the class loading plate "technology, for suppliers bring new challenges, is thought to be referring to the apple.
Market had been rumors, apple is seeking can replace the existing HDI (high density circuit board) of the class loading plate "technology, in order to adapt to the smartphone adoption of SIP (system level package) trend. With the SIP is equipped with components of the increase in the number of over limit load of HDI, Apple hopes to further introduce" class load board material application.
Wu Jian says frankly, the global smart phone market size each year about 20 billion branch, is close to saturation, the future will not appear too big change, also won't have significant growth. In order to meet the needs of customers Huatong has begun to layout the load board production line, have the confidence to grasp the business opportunities.
On 17 Huatong shareholders meeting, Wu Jian said that because of the infrastructure in place, strategy is in the right direction, 2015 years of successful paid out beautiful transcripts, revenue and profit all over the past few years have considerable growth. Especially in smart phones, although revenue growth is not a special Torgovnik Bie Mingxian, but because yield increase, the contribution to the company profit is not small.
Huatong last year net income after tax 28.67 million yuan, annual growth rate reached 44.3%, conversion per share after tax net income 241 yuan, hit a new high of nearly eight years, the shareholders today will cash dividend per share allotment by 1 yuan
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