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General positioning holes in PCB production

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1. Pressing positioning holes: For preventing deviation of each copper clad in multilayer PCB compress process.

2. Mechanical drilling position holes: Positioning for mechanical drill process. Generally made from X-ray drilling, right after compress process.

3. Copper plating inspecting holes: Holes for inspecting the integrity of PTH copper wall in Cu plating process. They are mechanical drilled holes.

4. Outer line positioning holes: Positioning the film for the outer line. They are mechanical drilled holes.

5. Soldermask positioning holes: For Soldermask positioning. Mechanical drilled holes.

6. Legend positioning holes: For silkscreen positioning. Mechanical drilled holes. It may be shared with other process positioning holes.

7. The second drilling and milling positioning holes: for second drilling and milling positioning. Boreholes drilled. It may be shared with other holes.

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The consideration of the above is general positioning holes in PCB production process, without regarding to special processing boards, such as: HDI PCB, laser drilling PCB etc. Above holes are only added in production panel by PCB supplier and only used for the production, would not appear in single pieces of PCB.

Positioning holes Multilayer PCB Mechanical drilling Copper plating Soldermask Legend Second drilling Production panel HDI PCB Laser drilling PCB

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General positioning holes in PCB production

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