Encapsulated semiconductor chip module and method of forming the

Details Encapsulated semiconductor chip module and method of forming the Encapsulated semiconductor chip module and method of forming the

1993-09-02

1996-12-17

Thomas, Laura

Electricity: conductors and insulators

Boxes and housings

Hermetic sealed envelope type

257666, 257667, 257789, H01L 2302

Patent

active

055856004

ABSTRACT:
The present invention provides a method for forming an improved lead-on chip semiconductor module and an improved module of this type. In a lead-on chip semiconductor device, a semiconductor chip which has a major surface having input and output bonding pads thereon, is secured to a lead frame having a plurality of leads adjacent the bonding pads by means of bonding wires connecting a respective one of the leads to a pad on the chip. A coating of dielectric material having a Young's modulus in the range of about 10 psi to about 500 psi is disposed around the entire length of each of the wires and over the pads and over the portion of the respective leads to which the wires are connected to act as a stress buffer. This material preferably has a T.sub.g of at least as low as -40.degree. C. Also preferably this package is encapsulated with conventional encapsulant.

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