Patent ID: 7405940
Filing Date: 2008-07-29
Classification: H01L,H05K

Abstract:
1. A method for resetting pistons in a multichip module, the method comprising: providing a base including a plurality of projections; disposing a hat upwardly of said base, said hat including a plurality of pistons that are positionally fixed in said hat and a plurality of adjustable pistons that are vertically adjustable within said hat in a direction towards said base; aligning each of said plurality of adjustable pistons with one of said plurality of projections; holding a spring loaded sleeve having a plurality of springs with a mass equivalent plate and disposing said spring loaded sleeve and said mass equivalent plate upwardly adjacent of said hat; aligning each spring of said spring loaded sleeve with one of said plurality of adjustable pistons; clamping said base, said hat, said spring loaded sleeve, and said mass equivalent plate together via a spring loaded clamp; subjecting a temporary assembly of said hat, said mass equivalent plate, said base, said spring loaded sleeve, and said clamp to a furnace reflow operation; causing said springs of said spring loaded sleeve to apply a pressure to each of said adjustable pistons via said subjecting; and resetting said adjustable pistons to their original positions via said pressure.