International Business Machines Corporation

Barbara D Grant

Nicholas J Clecak

Carlton G Willson

Carol R Jones

Robert Dennis Miller

Clinton David Snyder

Glenn T Sincerbox

Paul L Gendler

Lester A Pederson

Gary Scott Keller

Richard D Balanson

Augustus C Ouano

Terry C Tompkins

Magdalena M Hilden

Ying Ying Cheng

Annette B Jaffe

A lithographic resin for use with deep ultraviolet radiation comprises a weakly acidic resin and an alpha phosphoryl substituted diazo carbonyl compound as a sensitizer.

High contrast, high resolution deep ultraviolet lithographic resist

A process is described for fabricating an encapsulated circuit board. The process involves use of an adhesive which is photochemically curable to a limited preselected depth so as to rigidly fix the circuit wires in X and Y directions while permitting limited pliability of the adhesive and hence mobility of the wires in the Z direction. The adhesive preferably is one which is also thermally curable so that at a later stage of fabrication (e.g., either as a part of or after lamination of individual circuit boards into a multilayered circuit board), the complete unit may be thermally bulk cured to rigidly fix all wires in the Z direction.

Process for making an encapsulated circuit board and products made

A method for making high diffraction efficiency holograms from dichromated gelatin (DCG) including the steps of curing the DCG for a specified time under controlled temperature and humidity conditions, periodically removing the DCG material from the curing conditions, placing a dye spot on the cured DCG material, measuring the extent of diffusion of the dye spot after a predetermined time, replacing the DCG material into the curing conditions, repeating the method until dye spot diffusion of a predetermined size occurs, and using the DCG material at that cure state to make holograms.

Method for making high efficiency holograms

A resist sensitive to electron beam (and X-ray) radiation but resistant to reactive ion etching is formulated from a novolac resin and a sensitizer which is a terpolymer of sulfur dioxide, an olefin is hydrocarbon and an unsaturated ether.

Terpolymer resist compositions

Phenolic-aldehyde resins sensitized with Meldrum's diazo or a homologue thereof are useful as lithographic resists sensitive to deep ultra-violet light.

Ultra-violet lithographic resist composition and process

A medium for electrochromic recording is provided by treating paper with a water soluble leuco methylene blue compound having the formula ##STR1## wherein R is a sulfonated aromatic or sulfonated aliphatic moiety.

Electrochromic recording paper

Lithographic resist compositions are provided which permit an improved lift-off process in which the deposition mask with apertures has the desirable negative slope or overhang. The resist composition comprises a phenolic-aldehyde resin, a photosensitizer and Meldrum's diazo, or Meldrum's acid or suitable analogs thereof as a profile modifying agent. The profile modifying agents useful in the present invention have the formula: ##STR1## wherein R.sub.1 is C.sub.1 to C.sub.20 alkyl or aryl, R.sub.2 is H, C.sub.1 to C.sub.20 alkyl or aryl, or together R.sub.1 and R.sub.2 are cycloalkyl, A is N or H.

Lithographic resist composition for a lift-off process

Electrochromic display devices having very desirable stability and reversibility are obtained using as the oxidant certain fluorene compounds substituted with at least two alkoxy groups per molecule. The display device comprises a reactive medium between two electrically conductive electrodes at least one of which is transparent. The reactive medium comprises an anhydrous solvent and an oxidant/reductant pair.

Growing community of inventors

San Jose, CA, United States of America

Barbara D Grant