Polysilanes, polysiloxanes and silicone resist materials contain

Details Polysilanes, polysiloxanes and silicone resist materials contain Polysilanes, polysiloxanes and silicone resist materials contain

1991-03-21

1993-03-30

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 10, 525474, C08G 7704

Patent

active

051985209

ABSTRACT:
The polysilanes and polysiloxanes of the present invention are polymers that contain silicon in the principal chain, and contain in the side chains alkaline soluble groups such as phenol-based hydroxy group and carboxyl group.
One silicone resist material of the present invention comprises the polysilane or the polysiloxane in the above.
Another silicone resist material of the present invention contains the above polysilane or polysiloxane, and an appropriate photosensitive agent.
Still another silicone resist material of the present invention does not contain the above photosensitive agent, and in its stead, it contains a group that possesses photosensitive to ultraviolet rays or the like, via a siloxane bonding in the principal chain. As a substance with such photosensitivity, one may mention, for example, o-nitrobenzylsilyl groups that presents alkaline solubility when it is irradiated by ultraviolet rays.
Accordingly, the silicone resist materials of the present invention, especially the second and third silicone resist materials, are alkaline developable, and also possess a superior resistance to oxygen plasma. Therefore, they can be used as a top layer film in the two-layered resist system, making it possible to form very fine resist patterns, fast and with a minimum number of processing steps.

REFERENCES:
patent: 4588801 (1986-05-01), Harrah et al.
patent: 4820788 (1989-04-01), Zeigler
patent: 4822716 (1989-04-01), Onishi et al.

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