Patents Assigned to OCG Microelectronic Marterials, Inc.
  • Patent number: 5338652
    Abstract: A novolak resin composition comprising at least one unit of the reaction product of a para-, para-bonded bisphenol having formula (A): ##STR1## wherein R.sub.1 =hydrogen, lower alkyl group having 1-4 carbon atoms, halogen, or lower alkoxy group having 1-4 carbon atoms; whereinR.sub.2 =hydrogen or lower alkyl group having 1-4 carbon atoms; and whereinX is selected from the group consisting of: CH.sub.2, CH(CH.sub.3), C(CH.sub.3).sub.2, O, and S;with a bismethylol monomer selected from a difunctional ortho-, ortho-phenolic bismethylol of Formula (B), a difunctional ortho-, para-phenolic bismethylol of Formula (C): ##STR2## wherein R.sub.3 is selected from CH.sub.3, CH.sub.2 CH.sub.3, Cl, and Br; and whereinR.sub.4 is selected from H and CH.sub.3.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: August 16, 1994
    Assignee: OCG Microelectronic Marterials, Inc.
    Inventors: Thomas R. Sarubbi, Joseph J. Sizensky