Novolak resins of lowered hydroxyl content and high contrast hig

Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

430192, 430193, 430326, 528129, 528155, 528156, C03F 7023, G03C 176, C08G 804, C08G 1404

Patent

active

051821842

ABSTRACT:
Novolak resins are provided which are the condensation product of (a) a phenol, phenol derivative, or mixtures thereof, and (b) a mixture of formaldehyde or a formaldehyde precursor and (1) a monohydroxy aromatic aldehyde and wherein at least a portion of the hydroxyl groups thereof are esterified or (2) a mixture of at least one monohydroxy aromatic aldehyde and at least one non-hydroxylic aromatic aldehyde; the novolak resins having a hydroxyl number of from about 120 to about 180 grams of resin per equivalent of hydroxyl. The novolak resins are especially useful in positive photoresist formulations and have enhanced photospeed and film loss characteristics as well as improved thermal stability.

REFERENCES:
patent: 4564575 (1986-01-01), Perreault et al.
patent: 4681923 (1987-07-01), Demmer et al.
patent: 4725523 (1988-02-01), Miura et al.
patent: 4920028 (1990-04-01), Lazarus et al.
patent: 4943511 (1990-07-01), Lazarus et al.
patent: 4971887 (1990-11-01), Schmitt et al.
patent: 4980264 (1990-12-01), Chiong et al.
patent: 4983492 (1991-01-01), Trefonas, III et al.
patent: 4996122 (1991-02-01), Lazarus et al.
patent: 4997734 (1991-03-01), Lazarus et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Novolak resins of lowered hydroxyl content and high contrast hig does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Novolak resins of lowered hydroxyl content and high contrast hig, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Novolak resins of lowered hydroxyl content and high contrast hig will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1412182

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.