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Fig. 1 illustrates a scaled-up version of a TAB tape and the specific area of discussion.
English (United States)
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Stress Relief for Tape Automated Bonding (TAB) Tape
Fig. 1 illustrates a scaled-up version of a TAB tape and the specific area of
During tape manufacturing, two dissimiliar materials (copper and polyimide)
are laminated. The stresses and shrinkage resulting during manufacturing are
focused along cross bar 1. The other areas across the tape have enough
interruptions of lamination to neutralize the force seen at cross bar 1. The length
of the cross bar design is a contributing factor to the severity of curl.
Fig. 2 teaches the art of using stress relief 2 and 4 in the cross bar of TAB
tape. Area 2 shows a mechanical control between cross bar 3 and the rails 5.
The voidance of polyimide 4 in areas along cross bar 3 will also disrupt the force
of polyimide on the copper.