Shipley Company LLC

George J Cernigliaro

Egon Matijevic

Daniel Y Pai

Todd A Richardson

Charles R Shipley

Yie-Shein Her

The adsorption of cationic dyes on nanosize negatively charged silica particles to form colored pigments is disclosed. The dyes are chemisorbed and their uptake is controlled by the strong chemical reaction between the negative surface of the adsorbent silica particles preferably with sodium counter ions and the positive charge of the dyes. The prepared pigments are useful in the formation of color films and their optical properties are described. Photoresists using nanosized pigments are also disclosed herein which are useful in making color filters for liquid crystal displays.

Dyed silica pigments and products made from same

The adsorption of anionic dyes on nanosize alumina modified silica particles to form colored pigments is disclosed. The dyes are chemisorbed and their uptake is controlled by the strong chemical reaction between positive surface of the absorbent and negative charge of the adsorbates. The prepared pigments are useful in the formation of color films and their optical properties are described. Photoresists using nanosized pigments are also disclosed herein which are useful in making color filters for liquid crystal displays.

Dye incorporated pigments and products made from same

This invention is for a photoresist capable of withstanding temperatures in excess of 200.degree. C. without image distortion. The photoresist comprises a high temperature diazo sensitizer, preferably an ester or amide of an o-quinone diazide sulfonic or carboxylic acid chloride, in a binder comprising a polyvinyl phenol. The sensitizer and polyvinyl phenol react with each other at elevated temperature. The sensitizer has a secondary decomposition temperature and the polyvinyl phenol has a flow temperature at least equal to the temperature where reaction between the two occurs.

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Freeport, ME, United States of America

George J Cernigliaro