Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
A clamping fixture is used to join a heatsink/cap assembly to a substrate with a spring-loaded screw that is designed to apply a consistent specified force (regardless of the substrate thickness) such that a seal band that resides between heatcap/assembly and substrate will hermetically seal when assembly passes through a cap-join furnace. The fixture works as follows. As seen in the drawing, the assembled fixture consists of a base 1 that accommodates a substrate 2 and a heatsink/cap 3 that fits on substrate 2. The substrate 2 is held in the proper X and Y orientation by locating tabs 4, front and back (back not seen) that have a slot 5 that positions substrate 2 by means of a tab on substrate (not seen). A locating pin 6 locates base 1 in the proper position on a cap-positioning tool 7.