Ppg Industries, Inc.

Microchem Inc.

Media Chemical Corp.

Olin Microelectronic Chemicals, Inc.

Carl M. Rodia & Associates

Rodney J Hurditch

John C Crano

Daniel J Nawrocki

Won S Kwak

Patricia L Kwiatkowski

Donald W Johnson

Kenji Honda

John Griffiths

Cindy X Chen

Mark J Shaw

Neela Joshi

Alkaline soluble maleimide-containing polymers

Compositions useful for a lift-off resist in a bilayer metal lift-off process which comprise a mixture of at least one solvent, at least one polyglutarimide resin and an effective amount of at least one dissolution rate modifier selected from a group consisting of 2,3,4,2&prime;,3&prime;,4&prime;-hexahydroxybenzophenone; hexahydroxyspirobiindane; 2,4,2&prime;,4&prime;-tetrahydroxybenzophenone; 1,1,1-tris-hydroxyphenylethane; 1,7-bis-(hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione and at least one arylsulfonate ester of these poly-hydroxy aromatic compounds.

Poly-hydroxy aromatic dissolution modifiers for lift-off resists

A composition useful for a thick-film negative resist comprising a mixture of at least one epoxidized polyfunctional bisphenol A formaldehyde novolak resin and at least one photoacid generator in a coating solvent, a majority amount of said coating solvent being cyclopentanone.

Fast drying thick film negative photoresist

Compositions useful for a lift-off resist in a bilayer metal lift-off process, which comprise a mixture of at least one solvent, at least one polyglutarimide resin and an effective amount of at least one actinic-absorbing dissolution rate modifier having the formulae of (IA) or (IB):

Dissolution rate modifiers for lift-off resists

A composition suitable for forming an optical information recording layer for carrying out recording and readout with laser beams, which comprises at least one cyanine dye, and at least one leuco compound of formulae (VII) or (VIII); and optionally, at least one aminium compound of formulae (IV) or (V).

Stabilized dye compositions for optical recording media

A dye composition for use in optical recording media, comprising at least one cyanine dye having an anion selected from the group consisting of thiocyanate, lactate, hypophosphite, tetracyanonickelate, selenocyanate, trifluromethanesulfonate, ferricyanide, 4-hydroxybutyrate, nitrite, 2-(3',5'-dimethyl-2'-hydroxyphenyl)-2H-benztriazole-4-sulfonate, 1,2-napthoquinone-2-diazide-5-sulfonate and picrate and preferably dissolved in ethyl lactate.

Dye composition for optical recording media having selected anions

The present invention is directed to a dye composition for use in CD-R recording media and having reduced wavelength dependence of the dye layer absorption, comprising:

Multi-component dye compositions for optical recording media

A noncorrosive post-etch residue cleaning composition containing:

Redox reagent-containing post-etch residue cleaning composition

Variable-transmittance articles, such as an ophthalmic lens, are prepared by applying to or incorporating within the article a combination of two (or more) organic photochromic substances exhibiting different activated absorption maxima within the matrix in which the substances are incorporated. One organic photochromic substance has an absorption maximum within the range of between greater than 590 and about 700 nanometers. The other organic photochromic substance exhibits at least one absorption maximum and preferably two absorption maxima, within the range of between about 400 and less than 590 nanometers. The organic photochromic substances are used in a proportion to achieve a near neutral coloring of the article. The article may also be tinted with a light compatible tint (dye) to achieve a more neutral color when the photochromic substances are activated.

Method for preparing variable-light transmittance article

Variable-transmittance articles, such as an ophthalmic lens, are prepared by applying to or incorporating within the article a combination of two (or more) organic photochromic substances exhibiting different activated absorption maxima within the matrix in which the substances are incorporated. One organic photochromic substance has an absorption maximum within the range of between greater than 590 and about 700 nanometers. The other organic photochromic substance exhibits at least one absorption maximum and preferably two absorption maxima, within the range of between about 400 and less than 500 nanometers. The organic photochromic substances are used in a proportion to achieve a near neutral coloring of the article. The article may also be tinted with a light compatible tint (dye) to achieve a more neutral color when the photochromic substances are activated.

Variable-light transmittance article and method for preparing same

Described are photochromic spiro[indoline-2,3'[3H] pyrido [3,2-f][1,4]-benzoxazine compounds having a C.sub.1 -C.sub.4 monohaloalkyl or C.sub.1 -C.sub.4 polyhaloalkyl substituent on the indoline ring, and their use in plastic hosts to impart a photochromic response thereto.

Photochromic compound and articles containing the same

Photochromic compounds represented by the graphic formula: ##STR1## wherein: (a) R.sub.1 is selected from the group consisting of C.sub.1 -C.sub.8 alkyl, phenyl, phen(C.sub.1 -C.sub.4) alkyl, allyl and mono- and di-substituted phenyl, said substituents being selected from C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.5 alkoxy;

Growing community of inventors

Providence, RI, United States of America

Rodney J Hurditch