Invention Grant
- Patent Title: Flip chip self-alignment features for substrate and leadframe applications
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Application No.: US16042566Application Date: 2018-07-23
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Publication No.: US10861776B2Publication Date: 2020-12-08
- Inventor: Marc Alan Mangrum
- Applicant: Amkor Technology Singapore Holding Pte. Ltd.
- Applicant Address: SG Singapore
- Assignee: Amkor Technology Singapore Holding Pte. Ltd.
- Current Assignee: Amkor Technology Singapore Holding Pte. Ltd.
- Current Assignee Address: SG Singapore
- Agency: McAndrews, Held & Malloy, Ltd.
- Main IPC: H01L23/495
- IPC: H01L23/495 ; H01L23/00 ; H01L23/544 ; H01L21/48

Abstract:
Methods and system for flip chip alignment for substrate and leadframe applications are disclosed and may include placing a semiconductor die on bond fingers of a metal leadframe, wherein at least two of the bond fingers comprise one or more recessed self-alignment features. A reflow process may be performed on the semiconductor die and leadframe, thereby melting solder bumps on the semiconductor die such that a solder bump may be pulled into each of the recessed self-alignment features and aligning the solder bumps on the semiconductor die to the bond fingers. The recessed self-alignment features may be formed utilizing a chemical etch process or a stamping process. A surface of the recessed self-alignment features or the bond fingers of the metal leadframe may be roughened. A solder paste may be formed in the recessed self-alignment features prior to placing the semiconductor die on the bond fingers of the metal leadframe.
Public/Granted literature
- US20190043789A1 FLIP CHIP SELF-ALIGNMENT FEATURES FOR SUBSTRATE AND LEADFRAME APPLICATIONS Public/Granted day:2019-02-07
Information query
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