Leadframe SiP with Conformal Shield

• 발행기관: 한국마이크로전자및패키징학회
• 간행물 정보: 『마이크로전자 및 패키징학회지』제23권 제4호, 31~34쪽, 전체 4쪽
• 주제분류: 공학 > 산업공학
• 파일형태: PDF
• 발행일자: 2016.12.31

영문 초록

System In Package (SiP) is getting popular and momentum for the recent wearable, IoT and connectivity application apart from mobile phone. This is driven by market demands of cost competitive, lighter and smaller/thinner and higher performance. As one of many semiconducting assembly products, Leadframe product has been widely used for low cost solution, light/ small and thin form factor. But It has not been applied for SiP although Leadframe product has many advantages in cost, size and reliability performance. SiP is mostly based on laminate substrate and technically difficult on Leadframe substrate because of a limitation in SMT performance. In this paper, Leadframe based SiP product has been evaluated about key technical challenges in SMT performance and electrical shield technology. Mostly Leadframe is considered not available to apply EMI shield because of tie-bar around package edge. In order to overcome two major challenges, connection bars were deployed properly for SMT pad to pad and additional back-side etching was implemented after molding process to achieve electrical isolation from outer shield coating. This product was confirmed assembly workability as well as reliability.

목차

1. Introduction

2. BOM and Process Review

3. Leadframe for SMT Process and Shield Process

4. SMT Process

5. Shield Process and Reliability

6. Conclusion

References

키워드

SiP SiP Leadframe packaging shield Shield ring Backside etching