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Patent Searching and Data


Title:
MANUFACTURE OF SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JPH07263548
Kind Code:
A
Abstract:

PURPOSE: To prevent the peel-off of films caused by strong tensile stress that tungsten has and increase the degree of integration and reliability of a semiconductor device and make it a multilayer one by forming a film which has compressive stress between an interlayer insulating film and tungsten.

CONSTITUTION: An interlayer insulating film 2 and then a silicon nitride film 8 which has compressive stress are so deposited as to cover a lower-layer interconnect 1 formed on a semiconductor substrate. Then, an adhesive layer 4 is formed on the silicon nitride film 8 and tungsten 5 is deposited on the adhesive layer 4. Since the silicon nitride film 8 and the tungsten 5 are tightly adhered to each other with the adhesive layer 4, the peel-off of films can be prevented at an interface between the two films. Due to this structure, strong tensile stress that the tungsten 5 has is offset with compressive stress of the silicon nitride film through the adhesive layer 4 and therefore stress accumulated in the inside of the structure of an integrated circuit is lessened and there is no peel-off of films. By this method, a semiconductor device can be highly integrated and multilayer one and the reliability of the device can also be increased.


Inventors:
IIO KOKI
Application Number:
JP4959094A
Publication Date:
October 13, 1995
Filing Date:
March 18, 1994
Export Citation:
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Assignee:
FUJITSU LTD
International Classes:
H01L23/522; H01L21/318; H01L21/768; (IPC1-7): H01L21/768; H01L21/318
Attorney, Agent or Firm:
Teiichi