Method of forming metal line in semiconductor device

Details Method of forming metal line in semiconductor device Method of forming metal line in semiconductor device

2006-05-02

2006-05-02

Deo, Duy-Vu N. (Department: 1765)

Semiconductor device manufacturing: process

Coating with electrically or thermally conductive material

To form ohmic contact to semiconductive material

C438S633000, C438S634000, C438S637000

Reexamination Certificate

active

07037822

ABSTRACT:
Disclosed in a method of forming a metal line in a semiconductor device. The method includes the steps of sequentially forming a first etch stop film, a second interlayer insulating film and a BARC film on a first interlayer insulating film into which a metal line is buried, forming a photoresist pattern defining a trench in a given region of the BARC film, performing an etch process up to the second interlayer insulating film using the photoresist pattern as an etch mask to form a trench, removing the photoresist pattern and the BARC film by means of a first wet etch process, etching the first etch stop film by means of a second wet etch process using the second interlayer insulating film an as etch mask, and cleaning the resulting entire surface by means of a third wet etch process. As such, by removing the photoresist pattern, the BARC film and the etch stop film through the wet etch process, it is possible to reduce the amount of polymer generated in the process for forming the via hole and the metal line trench.

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