Invention Grant
- Patent Title: Method of fastening a semiconductor chip on a lead frame, and electronic component
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Application No.: US16604252Application Date: 2018-04-18
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Publication No.: US11094559B2Publication Date: 2021-08-17
- Inventor: Mathias Wendt , Andreas Weimar
- Applicant: OSRAM OLED GmbH
- Applicant Address: DE Regensburg
- Assignee: OSRAM OLED GmbH
- Current Assignee: OSRAM OLED GmbH
- Current Assignee Address: DE Regensburg
- Agency: DLA Piper LLP (US)
- Priority: DE102017108422.3 20170420
- International Application: PCT/EP2018/059928 WO 20180418
- International Announcement: WO2018/192987 WO 20181025
- Main IPC: H01L21/48
- IPC: H01L21/48 ; H01L21/768 ; H01L23/498 ; H01L23/00 ; H01L21/60

Abstract:
A method of attaching a semiconductor chip on a lead frame includes A) providing a semiconductor chip, B) applying a solder metal layer sequence to the semiconductor chip, wherein the solder metal layer sequence includes a first metallic layer including indium or an indium-tin alloy, C) providing a lead frame, D) applying a metallization layer sequence to the lead frame, wherein the metallization layer sequence includes a fourth layer including indium and/or tin arranged above the lead frame and a third layer including gold arranged above the fourth layer, E) forming an intermetallic intermediate layer including gold and indium, gold and tin or gold, tin and indium, G) applying the semiconductor chip to the lead frame via the solder metal layer sequence and the intermetallic intermediate layer, and H) heating the arrangement produced in G) to attach the semiconductor chip to the lead frame.
Public/Granted literature
- US20200152480A1 METHOD OF FASTENING A SEMICONDUCTOR CHIP ON A LEAD FRAME, AND ELECTRONIC COMPONENT Public/Granted day:2020-05-14
Information query
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