Browse Prior Art Database

Slim and Fine Liquid Crystal Display Driver Packaging

IP.com Disclosure Number: IPCOM000115777D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Ogawa, H: AUTHOR [+3]

Abstract

Disclosed is a Liquid Crystal Display (LCD) package interconnection technology between LCD driver Tape Automated Bonding (TAB) and Printed Circuit Board (PCB) using Anisotropic Conductive Film (ACF). This structure has an advantage on packaging compactness comparing with conventional one.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Slim and Fine Liquid Crystal Display Driver Packaging

      Disclosed is a Liquid Crystal Display (LCD) package
interconnection technology between LCD driver Tape Automated Bonding
(TAB) and Printed Circuit Board (PCB) using Anisotropic Conductive
Film (ACF).  This structure has an advantage on packaging compactness
comparing with conventional one.

      Fig. 1 shows the disclosed structure of the interconnection
between TAB and PCB.  Comparing with Fig. 2 that is a conventional
structure, total peripheral dimension can be reduced by dimension "A"
by following reason.

      In the conventional structure, the bonding sets base film
deformed to get stabilized electrical contact between TAB lead and
PCB pad.  This deformation will produce the mechanical stress on
Integrated Circuit (IC) coat and may result in IC coat crack.  To
prevent from this severe defect, dimension "A" is designed far enough
from IC coat.

      The disclosed structure provides the flexibility of the bonding
lead.  This will reduce the stress to IC coat during/after the
bonding.  From this advantage, disclosed structure can design smaller
"A" dimension than conventional one and achieve the compact
packaging.