HYDRAULIC PRESS WAFER LAMINATION
Original Publication Date: 1999-Jun-30
Included in the Prior Art Database: 2004-Apr-09
Xerox Disclosure Journal
Disclosed is a heated hydraulic platen press for bonding the heater and channel wafers of a thermal ink jet printhead together. The accompanying figure shows the arrangement. In press 2 a heated platen 8 attaches to the underside of an upper press plate 4. Likewise, a heated platen 8 attaches to the upper side of a bottom press plate 6. A swivel 22 having a cylinder piston 24 affixed thereto attaches to the underside of press plate 6. Printheads 10 are placed in the press between a first ring 12 and a second ring 14. A third ring 16 separates rubber pads 18 and 20. Each of the pads 18 and 20 are faced with an adhesive-backed Teflon@-filled glass cloth that provides for release of the bonded printhead and a compliant surface for pressure distribution to the fragile channel surface. The purpose of the rings 12, 14, and 16 is to restrain movement of the rubber pads 18 and 20 with the result that under compression, a pad's behavior mimics that of a fluid. At 65 pounds per square inch (PSI) compression, the two rubber pads 18 and 20 compress a total of approximately 0.015 inches.