Browse Prior Art Database

New Class of MLC (Multi Layer Ceramic) Pastes

IP.com Disclosure Number: IPCOM000102760D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Related People

Deshefy, DL: AUTHOR [+4]

Abstract

In the preparation of green sheets for semiconductor manufacturing purposes, pastes are applied to the unfired ceramic sheet. An invention has been developed which proposes the use of linear aliphatic alcohols as solvents for MLC pastes.

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This is the abbreviated version, containing approximately 100% of the total text.

New Class of MLC (Multi Layer Ceramic) Pastes

      In the preparation of green sheets for semiconductor
manufacturing purposes, pastes are applied to the unfired ceramic
sheet.  An invention has been developed which proposes the use of
linear aliphatic alcohols as solvents for MLC pastes.

      In the manufacturing operation, it is desirable to formulate
pastes with the following properties:
      1.   They should provide high quality screening of fine lines
      2.   They should cause a minimum or no distortion of the green
sheet upon which they are screened.
      3.   They should have good screening properties.
Three different linear aliphatic alcohols were tested which showed
improved properties.  They were oleyl alcohol, decanol, and a 15:85
mixture of tetradecanol and dodecanol.

      In the development work, pastes were made and screened with all
of the solvents and with both molybdenum and copper powder.
Experimental results showed that the tetradecanol/decanol based
pastes gave minimum green sheet distortion.  Oleyl alcohol pastes
provided excellent distortion results but drying was a problem.
Decanol pastes were similar to those made with the tetradecanol/
decanol blend.  When the blend was used to make pastes with coated
copper, the resultant paste was substantially less tacky than when
made with previously used solvents.

      Disclosed anonymously.