China Wholesale Power Supply Pcb Board Pricelist - 6 Layer ENIG Heavy Copper PCB – Huihe
China Wholesale Power Supply Pcb Board Pricelist - 6 Layer ENIG Heavy Copper PCB – Huihe Detail:
Crack problem of inner thick brazing pad
The demand for heavy copper PCB is increasing, and the inner layer pads are getting smaller and smaller. The problem of pad cracking often occurs during PCB drilling (mainly for large holes above 2.5mm).
There is little room for improvement in the material aspect of this kind of problem. The traditional improvement method is to increase the pad, increase the peeling strength of the material, and reduce the drilling rate, etc.
Based on the analysis of PCB processing design and technology, the improvement plan is put forward: copper cutting treatment (when etching the inner layer of the solder pad, the concentric circles smaller than the aperture are etched) is carried out to reduce the pulling force of copper during drilling.
Drilling a drill hole that is 1.0mm smaller than the required aperture, and then carry out normal aperture drilling (secondary drilling) to solve the crack problem of inner thickness brazing pad.
Applications of the heavy copper PCB
Heavy copper PCB is used for a variety of purposes, e.g. in flat transformers, heat transmission, high power dispersion, control converters, etc. In PC, automotive, military and mechanical control. A large number of copper PCBs are also used:
Power supply and control converter
Welding tools or equipment
The automobile industry
Solar panel manufacturers, etc
Equipment display
Automatic Plating Line
PTH line
LDI
CCD Exposure Machine
Our factory
Product detail pictures:
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we could supply good quality goods, aggressive cost and very best purchaser assistance. Our destination is "You come here with difficulty and we supply you with a smile to take away" for China Wholesale Power Supply Pcb Board Pricelist - 6 Layer ENIG Heavy Copper PCB – Huihe , The product will supply to all over the world, such as: Lyon, Panama, Swiss, Faced with the vitality of the global wave of economic integration, we've been confident with our high-quality items and sincerely service to all our customers and wish we can cooperate with you to create a brilliant future.
By Janet from Hamburg - 2018.05.13 17:00
A good manufacturers, we have cooperated twice, good quality and good service attitude.
By Christopher Mabey from Zimbabwe - 2018.05.13 17:00