Active solid-state devices (e.g. – transistors – solid-state diode – Combined with electrical contact or lead – Flip chip
Reexamination Certificate
2005-05-17
2005-05-17
Weiss, Howard (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Combined with electrical contact or lead
Flip chip
C257S713000, C257S722000
Reexamination Certificate
active
06894397
ABSTRACT:
A flip chip structure contains laterally spaced semiconductor devices such as MOSFETs in a common chip. A deep trench isolates the devices. Contacts are connected to the source drain and gate electrode (or other electrodes) and are interconnected as required for a circuit function either within the chip or on the support board. Ball contacts are connected to the electrodes. The opposite surface of the chip to that in which the devices are formed receives a copper or other metal layer which is patterned to increase its area for heat exchange. The surface of the copper is coated with black oxide to increase its ability to radiate heat.
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Pavier Mark
Sammon Tim
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Weiss Howard
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