China Wholesale Motherboard Circuit Board Manufacturers - 4 Layer ENIG half hole PCB 12026 – Huihe

Difficulties in machining metallized half-hole PCB

Metalized half-hole PCB after forming the hole wall copper black, burr residual, deviation has been a difficult problem in the molding process of PCB factory. Especially the whole row of half holes similar to stamp holes, the aperture is about 0.6 mm, the hole wall spacing is 0.45 mm, the outer figure spacing is 2 mm, because the spacing is very small, it is easy to cause short circuit because of copper skin.

The general metallized half-hole PCB forming methods are CNC milling machine gongs, mechanical punching machine punching, V-CUT cutting and so on, these processing methods in removing the need for part of the hole to make copper, can not will lead to the remaining part of the PTH hole section of the remaining copper wire, burr, serious hole wall copper skin warp, peeling phenomenon. on the other hand, when the metallized half hole is formed, due to the influence of PCB expansion and shrinkage, hole position accuracy and forming accuracy, the size deviation of the remaining half hole on the left and right sides of the same unit is large, which brings great trouble to the welding assembly.

Reasons for increased costs for half-hole PCBs

Half hole is a special technological process, in order to ensure that there is copper in the hole, we must do half of the process when the gong edge, and the general half hole plate is very small, so the general cost of half hole plate is relatively high.

Application

Industrial control

Consumer electronics

Communication

Equipment display

Automatic Plating Line

PTH line

LDI

CCD Exposure Machine

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