스틸 메쉬 제조업체 및 조립 – 원 스톱 서비스

1. 스텐실 (스틸 메쉬)이란?

장착 구성 요소 자체는 바인딩 효과가 없습니다. PCB 무엇입니까? 이를 위해서는 PCB 기판에 솔더 페이스트 층을 인쇄해야합니다. 솔더 페이스트를 통해 마운팅 구성 요소와 PCB를 결합합니다.이 목적을 달성하려면 도구가 필요합니다.이를 스텐실이라고합니다. 스텐실은 또한 SMT . 주요 기능은 솔더 페이스트 증착을 돕는 것입니다. 목적은 정확한 양의 솔더 페이스트를 빈 PCB의 정확한 위치로 옮기는 것입니다.

2. 스텐실 (스틸 메쉬)의 진화

The Stencil was originally made of wire mesh, so it was called a mask at that time. It was nylon(polyester)mesh at first. But later because of the durability, there were wire mesh and copper wire mesh appeared. With the development of SMT, the requirements for stencil are getting higher, so the stainless stencil has been produced, which is replaced the previous other material stencils.

3. Classification of stencil

According to the manufacturing process of SMT stencil, it can be divided into laser template, electropolishing template, electroforming template, ladder template, bonding template, nickel plating template, etching template.

4. Specifications of stencil

Conventional stencil specifications are 30*40 cm, 37*47 cm, 42*52 cm, 42*52 cm, 45*55 cm, 55*65 cm, 58.4*58.4 cm and 73.6*73.6 cm. Which type of stencil is required, the processing factory will decide according to the type of SMT machine and PCBA processing. The customer only needs to provide the jointed board solder paste layer Gerber file to the processing factory.

The stencil is divided into two types: solder paste stencil and red rubber stencil. The processing factory will decide to use different processing techniques according to different process requirements, and then make different types of the stencil.

5. Stencil manufacturing process

The manufacturing process of the stencil includes chemical etching, laser cutting, and electroformed.

6. Opening design of the stencil

The design of the stencil should take into account the demolding properties of the solder paste, which is determined by the opening of the width-to-thickness ratio, area ratio, and the geometry of the open sidewall and the smoothness of the hole wall. The thickness, size, and shape of the stencil ensure the yield and reduce the defect rate.

7. Post-processing

Since after laser cutting will produce the metal slag adheres to the hole wall and the opening, the surface is generally polished; of course, polishing is not only to remove the slag (burr) but also to roughen the surface of the steel sheet. Increase the surface friction to facilitate the rolling of the solder paste to achieve a good tinning effect.

8. Cleaning

스텐실의 이형 성능을 유지하기 위해서는 사용 과정에서 스텐실 바닥을 정기적으로 닦고 사용 후 제 시간에 청소하여 다음에 더 나은 이형 효과를 얻을 수 있도록해야합니다. 강철 메쉬의 청소 방법은 일반적으로 닦기와 초음파 청소입니다.