Method for the smooth fine classification of varactor diodes

Details Method for the smooth fine classification of varactor diodes Method for the smooth fine classification of varactor diodes

1990-09-13

1992-04-07

Hearn, Brian E.

Fishing, trapping, and vermin destroying

437 6, 437 8, 437904, 437207, 148DIG162, 148DIG28, 324158D, H01L 2170, H01L 2700

Patent

active

051028182

ABSTRACT:
A "smooth" fine classification of varactor diodes according to their electrical parameters is achieved in the manufacturing process to provide groups of matched varactor diodes. The diodes are matched within a predetermined tolerance limit. The dice are picked up from the silicon wafer along a meander path generally perpendicular to the temperature gradient of the diffusion process steps applied to the wafer when the diodes were formed, mounted on a lead frame, bonded, encapsulated, removed from the lead frame, and measured.

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