Title: Process for making carbon-containing glass resistors

Abstract: An improved process for the production of carbon-containing glass resistors comprising impregnating porous glass with a furfuryl alcohol solution, flash-heating the impregnated glass at temperatures in the range of 150.degree.-225.degree.C. to polymerize the alcohol to a resin, and firing in a non-oxidizing atmosphere to convert the resin to carbon, is described. Substantially improved yields of high value resistors are obtained by the process.

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Inventors: Elmer, Thomas H. (Corning, NY, US)

Application Number: 544288
Filing Date: 1975-01-27
Publication_date: 1976-01-06
Assignee: Corning Glass Works (Corning, NY)
Primary Class(es): 65/32.4 65/60.3, 427/101, 427/122, 427/228, 428/426
Other Classes:
US Patent Ref:

3378431	Apr, 1968	Smit, Jr. et al.	65/32.
3390452	Jul, 1968	Huang	65/32.
3628984	Dec, 1971	Ishikawa et al.	427/228.
3632385	Jan, 1972	Schmitt et al.	427/228.
3640906	Feb, 1972	Wojcik	65/30.
3775078	Nov, 1973	Elmer et al.	65/32.
3810780	May, 1974	Ardary et al.	427/228.
3813232	May, 1974	Forke, Jr. et al.	65/32.

Other Refs:
Primary Examiner: Bashore, S. Leon
Assistant Examiner: Miga, Frank W.
Attorney: van der Sterre; Kees, Janes, Jr.; Clinton S., Patty, Jr.; Clarence R.