Types of Drilling Processes Single Pass Drill: The conventional method of drilling holes in PCBs where a bit passes through the PCB once to create a hole. Step Drill: A method to minimize bit breakage, where initially about 1/2 or 1/3 of the PCB is drilled and then the remaining portion is drilled to create the hole. Mainly used for thicker products. Double Drill: A method to enhance bit durabil..

2. Sectioning (Square Punching) Sectioning other than point sectioning involves a waxing-crescent-shaped mold, similar to a half-moon shape. The purpose of general sectioning is to observe a consistent thickness of plated layer. Substrates punched into squares are placed in molds with recesses. When analyzing a large number of substrates, it's common to place 3 to 4 substrates per recess. Howeve..

Substrate sectioning can be classified into three types based on the mold type, sectioning purpose, etc. Let's explore this and also look into p-lab as a side note. 1. Point Section A point section involves sectioning only up to a specific point. For example, it's often used to observe defects caused by foreign particles, such as bump defects or pinhole defects, on the substrate. The mold for a ..

4. The fully cured mold is now ready for sectioning. In simple terms, this involves using a grinder. There are four steps, from 1 to 4, with each step becoming progressively smoother. Step 1 is the roughest, so it's common to go up to step 1 just before reaching the desired height. For point sections, it's crucial to only section up to the exact point, so care must be taken not to remove the poi..

Through sectioning, you can observe a cross-section of the substrate. Today, we will delve into the process of sectioning. Process of Sectioning The process of sectioning is as follows: 1. Punch the substrate into small rectangles or squares. As explained later, for point sections, square punching is done, and you must be careful not to cut the point section during punching. 2. Insert the punche..

기판 섹션은 몰드의 종류, 섹션의 목적 등에 따라 세 가지로 분류할 수 있습니다. 이에 대해 알아보고, 번외로 p-lab에 대해서도 알아보겠습니다. 1. 포인트 섹션 포인트 섹션은 특정 포인트까지만 섹션을 하는 것을 말합니다. 예를 들어 기판에서는 홀 이물로 인한 돌기 불량이나, 핀홀 불량 등을 관찰할 때 사용되곤 합니다. 포인트 섹션의 몰드를 위에서 보면 반달 모양입니다. 뒤에서 설명하는 다른 섹션들은 기판을 한 번에 여러 장 넣기도 하지만, 포인트 섹션은 딱 한 장만 넣습니다. 이 한 장을 반달 몰드의 곡선 옆면이 아닌 평면 옆면에 붙여 세웁니다. 그 상태에서 몰드액을 붓는데, 기포가 차지 않도록 평면 옆면과 기판 사이에는 몰드액이 들어가지 않도록 합니다. 즉, 몰드액이 기판을 미는 힘으로만 고정하는..