content_image/911960.jpg content_image/911959.jpg content_image/911961.jpg
<img src='content_image/911960.jpg'>

[6] Acid Crosslinking Agent (D) Capable ofCrosslinking with the Alkali-Soluble Resin by the Action of an Acid 

Hereinafter, this agent is also referred to as "component (D)" or "crosslinking agent." 

A crosslinking agent is used in the negative photosensitive composition of the present invention. 

Any crosslinking agent can be used as long as it is a com› pound capable of crosslinking with the resin soluble in an alkali developer by the action of an acid. However, com› pounds (1) to (3) below are preferred. 

(1) A hydroxymethylated form, alkoxymethylated or acy› loxymethylated form of phenol derivative. 

(2) A compound having an N-hydroxymethyl group, an N-alkoxymethyl group or an N-acyloxymethyl group. 

(3) A compound having an epoxy group. 

The alkoxymethyl group preferably has 6 or less carbon atoms, and the acyloxymethyl group preferably has 6 or less carbon atoms. 

Those especially preferred among these crosslinking agents will be shown below. 

<img src='content_image/911959.jpg'>

-continued 

<img src='content_image/911961.jpg'>

-continued 

