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New tape carrier package design for LCD driver

IP.com Disclosure Number: IPCOM000013635D
Original Publication Date: 2000-Mar-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue

IBM

Abstract

Disclosed is a TCP (tape carrier package) design for the LCD (liquid crystal display) driver to be more reliable soldering than that of the current design. Figure shows an example of the disclosed new TCP design for the LCD driver and current design. Main two features are as follows; 1. A TCP usually has four through-lines, two through-lines on each right and left side, the through-line contacts a lead pad directly not via an IC (integrated circuit). Then in this new TCP design, four through-lines contact dummy pads and anchor pads directly, and the lead pad soldering should to be more reliable than that of the current design because new design widens four lead pads pitch per a TCP. 2. Adjacent two soldering pads for the dummy pad and the anchor pad on the printed circuit board integrate one soldering pad. Then the dummy pad and the anchor pad soldering shall be more reliable than that of the current design because new design expands the soldering area and increases the solder amount. Accordingly, a TCP using the disclosed design is expected to be more reliable soldering to the lead pad, the dummy pad, and the anchor pad. Figure 1 2