Browse Prior Art Database

Tape Carrier Package Alignment Method with Imbedded Mirror

IP.com Disclosure Number: IPCOM000116722D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Tomooka, T: AUTHOR

Abstract

Disclosed is the alignment method for Tape Carrier Package (TCP) to the substrate which is not transparent. The imbedded mirror on the substrate reflects the pattern image of the TCP surface and this reflected image can be used as an alignment aid to the substrate.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 77% of the total text.

Tape Carrier Package Alignment Method with Imbedded Mirror

      Disclosed is the alignment method for Tape Carrier Package
(TCP) to the substrate which is not transparent.  The imbedded mirror
on the substrate reflects the pattern image of the TCP surface and
this reflected image can be used as an alignment aid to the
substrate.

      The Figure shows the example of the implementation of this
alignment method.  The substrate and the TCP have patterns which
should be aligned and connected electrically.  The see-through image
from the back side of the substrate or from the top side of the TCP
will be used for the typical alignment method if the substrate and
the TCP are transparent.  The mirror located near the pattern on the
substrate reflects the pattern image of the TCP.  The image of this
reflected pattern and the pattern on the substrate can be observed by
the TV camera or by direct view with a slight angle.  Those two
patterns should be aligned by tweaking the position of the one of the
substrate or the TCP.  The aligned TCP is then attached to the
substrate for electrical connection.

The imbedded mirror is fabricated by the following technique.
  1.  Use the aluminum pattern on the silicon substrate.  (Fabricated
       as the mirror or the electrical pattern itself)
  2.  Use plated copper pattern on the printed circuit board.
       (Fabricated as the mirror or the electrical pattern itself)
  3.  Use the insulation or protection l...