Patents Represented by Attorney, Agent or Law Firm George W. Rauchfuss, Esq.
  • Photoresist strippers containing reducing agents to reduce metal corrosion
    Patent number: 6749998
    Abstract: Alkaline photoresist stripping compositions containing a reducing agent to reduce or inhibit metal corrosion are disclosed. Reducing agents include compounds containing reactive multiple bonds, hydrazine and derivatives thereof, oximes, hydroquinone, pyrogallol, gallic acid and esters thereof, tocopherol, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid, BHT, BHA, 2,6-di-tert-butyl-4-hydroxymethyl-phenol, thiols, salicylaldehyde, 4-hydroxybenzaldehyde and glycol aldehyde dialkylacetals.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: June 15, 2004
    Assignee: Mallinckrodt Baker Inc.
    Inventors: George Schwartzkopf, Geetha Surendran