PCB proofing the thickness of copper manufacturing process

by:Rocket PCB     2020-04-03
1: PCB panel recommended selection high Tg plank, to the thick copper circuit board, due to the copper thick thick, its heat conduction ability is stronger. Under the condition of same SMT, compared common sheet of Tg in are more likely to have layered blasting board, high Tg board white spot and so on. 2: PCB drilling for thick copper PCB, due to the copper thick thick, with each layer of the overlay, the thickness of copper has been in a large, when drilling, drilling knife friction within the plate for a long period of time prone to drill wear or broken knife, and then the quality of the hole wall, and further affect the reliability of the product. Line 3: PCB for thick copper PCB, due to the copper thick thick, when etching lines, processing difficulty than normal board. So increasing the line width in the design of space helps to decrease the difficulty of etching processing and for laminated rubber also has a big improvement. 4: PCB pressing for thick copper PCB, due to the copper thick thick, copper thick thick line clearance ever deeper. In the copper residue rate is the same situation, need resin filling quantity increases, the need to use more than one and a half curing ( PP) To meet the filling adhesive, the less when resin easily lead to lack of glue layer and thickness uniformity is poor. When laminated thick copper PCB due to the superposition effect of the inner line and the limitation of the resin flow, will lead to laminated after the residual copper of high rate of local area of relatively low residual copper rate of thickness thicker, due to uneven thickness of the PCB. So as far as possible in the design of the ascension of the inner copper uniformity. 5: PCB resistance welding for thick copper PCB, due to the copper thick thick, easy to appear when made in resistance welding ink thickness is not up to standard, the vertical flow, pseudo dew copper and bubble, etc. Industry often USES two solder resist printing, exposure to implement. Now with electrostatic spraying equipment support effect is better. Rocket PCB Solution co Ltd is a professional: PCB manufacture manufacturer, to provide you with: PCB proofing, batch plate, 1 - 34 layer PCB board, high TG board, impedance board, HDI board, Rogers plate, microwave plate, radio frequency (rf) board, LeiDaBan, thick copper foil board, such as PCB manufacturing production of various kinds of technology and material. Welcome to consult customer service for more details.
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