Review of Effect of Entry Material of CNC Drilling on PCB Manufacturing Paper

Quality of Surface is an important factor to decide the performance of a product. Optimization of the metal drilling requires generation of minimum amount of burrs and uniform appearance of the drilled holes. The burr is a plastically deformed material, generated during drilling & it is unnecessary output and often lowers the surface quality and reduces the product life and acceptability of the product. To improve the productivity of the drilling process, PCB are generally stacked in several layers and drilled simultaneously. In this process, the misalignment of the drilled holes on the top and bottom layers occurs, and this consequently degrades the overall product quality. The outcomes uncovered conceivable decrease of burr event on both the section and leave side of the sheet, requiring no extra deburring process. The demand on the uniform appearance of drilled holes was fulfilled as well as high productivity achieved. Such optimized process results in a noticeable production cost reduction. The burr, which is a plastically deformed material, generated during drilling is unnecessary output and often lowers the surface quality, reduces the product life and acceptability of the product.