Invention Grant
- Patent Title: Chip arrangements
-
Application No.: US15659670Application Date: 2017-07-26
-
Publication No.: US10930614B2Publication Date: 2021-02-23
- Inventor: Manfred Mengel , Alexander Heinrich , Steffen Orso , Thomas Behrens , Oliver Eichinger , Lim Fong , Evelyn Napetschnig , Edmund Riedl
- Applicant: Infineon Technologies AG
- Applicant Address: DE Neubiberg
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Neubiberg
- Agency: Viering, Jentschura & Partner MBB
- Main IPC: H01L23/00
- IPC: H01L23/00 ; B23K35/30 ; B23K35/26 ; B23K35/28 ; C22C13/00 ; C22C18/00 ; C22C18/04 ; C22C30/04 ; C22C30/06 ; H01L23/488 ; H01L23/495 ; B23K1/00

Abstract:
A chip arrangement including a chip comprising a chip back side; a back side metallization on the chip back side, the back side metallization including a plurality of layers; a substrate comprising a surface with a metal layer; a zinc-based solder alloy configured to attach the back side metallization to the metal layer, the zinc-based solder alloy having by weight 8% to 20% aluminum, 0.5% to 20% magnesium, 0.5% to 20% gallium, and the balance zinc; wherein the metal layer is configured to provide a good wettability of the zinc-based solder alloy on the surface of the substrate. The plurality of layers may include one or more of a contact layer configured to contact a semiconductor material of the chip back side; a barrier layer; a solder reaction, and an oxidation protection layer configured to prevent oxidation of the solder reaction layer.
Public/Granted literature
- US20170323865A1 CHIP ARRANGEMENTS Public/Granted day:2017-11-09
Information query
IPC分类: