The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 1990
Filed:
Nov. 15, 1989
David N Bull, Brockport, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A plurality of semiconductor chips are first attached to a transparent mask by placing indica marks on the mask and then viewing the chips through the mask and aligning them to the indica marks. The chips, which are held on a vacuum pedestal, are then brought into contact with the mask and a temporary adhesive layer holds the chips to the mask. The vacuum is then released. The mask with the chips attached thereto is then aligned to a printed circuit (wiring) board having indica marks thereon by viewing through the mask and moving the chips and printed circuit board together until they contact each other. A permanent adhesive layer holds the chips to the printed circuit board. The temporary adhesive layer is then dissolved and removed from the chips.