Invention Grant
- Patent Title: Methods for making a multilevel leadframe by etching a conductive sheet from two opposite sides
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Application No.: US15138298Application Date: 2016-04-26
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Publication No.: US10804114B2Publication Date: 2020-10-13
- Inventor: Lee Han Meng@ Eugene Lee , You Chye How
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Dawn Jos; Charles A. Brill; Frank D. Cimino
- Main IPC: H01L21/48
- IPC: H01L21/48 ; H01L23/31 ; H01L23/495 ; H01L23/00

Abstract:
A method for forming a multilevel leadframe for an integrated circuit is provided. A conductive sheet is etched from one side to form a thinner region within a frame region for leads lines and bond pads. The conductive sheet is etched to form a plurality of bond pads in a first level of the thinner region arranged in at least a first row and a second row. Each bond pad has a pad width and is separated from an adjacent bond pad by a bond pad clearance distance. The conductive sheet is etched from an opposite side to form a plurality of lead lines in a second level of the thinner region having a line width and is separated from an adjacent lead line by at least a lead line clearance distance. Each bond pad of the second plurality of bond pads is connected to one of the plurality of lead lines on the second level that is routed between adjacent bond pads in the first row, so that the lead lines are routed on a different level from the bond pads.
Public/Granted literature
- US20160240390A1 Multilevel Leadframe Public/Granted day:2016-08-18
Information query
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