IP Library Granted Patent US 7,501,706
Granted Patent B2
US 7,501,706 · App. 11/205,376 · Granted Mar 10, 2009

Semiconductor devices to reduce stress on a metal interconnect

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Quick Facts
Patent No.
US 7,501,706
App. No.
11/205,376
Granted
Mar 10, 2009
Kind
B2
Abstract

Semiconductor devices to reduce stress on a metal interconnect are disclosed. A disclosed semiconductor device comprises: a semiconductor substrate; an uppermost metal interconnect formed on the semiconductor substrate; an oxide layer formed on the substrate and the uppermost metal interconnect; an aluminum layer formed on the oxide layer; and a stress-relief layer formed on the aluminum layer to thereby prevent cracking of the passivation layer during a subsequent packaging process, to increase reliability of the passivation layer, and to prevent degradation of properties of the semiconductor device.

Claims (10)

1. A semiconductor device comprising:

a semiconductor substrate;

an uppermost metal interconnect formed on the semiconductor substrate;

an oxide layer formed on the uppermost metal interconnect, wherein the oxide layer is on the entire top surface of the uppermost metal interconnect;

an aluminum layer formed on the oxide layer; and

a stress-relief layer formed on the aluminum layer.

2. A semiconductor device as defined in claim 1 , wherein the stress-relief layer comprises an aluminum oxide layer.

3. A semiconductor device as defined in claim 1 , wherein the aluminum layer is formed in a thickness of 100 to 300 Å.

4. A semiconductor device as defined in claim 1 , wherein the oxide layer is formed of one of an undoped silica glass and a fluorinated silica glass.

5. A semiconductor device as defined in claim 1 , wherein the semiconductor device is at least one of a multi-interconnect adapted device and a power device.

Assignments (1)
CHANGE OF NAME Recorded Jun 6, 2006
From: DONGBU ANAM SEMICONDUCTORS, INC
To: DONGBU ELECTRONICS CO., LTD.
Reel/Frame 017718/0964 →