Browse Prior Art Database

Reflective Lands for Use in Multilayer Ceramic Liquid Crystal Watch Dials

IP.com Disclosure Number: IPCOM000079261D
Original Publication Date: 1973-Jun-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Haddad, MM: AUTHOR [+3]

Abstract

Multilayer ceramic techniques normally used for forming electronic modules can be employed to form liquid crystal watch dials. A digital reflective surface such as molybdenum, tungsten, etc., schematically depicted at 10, is formed by depositing the pattern at step 12 in the desired configuration on the top surface of a ceramic green sheet module. Thereafter, the module is subjected to laminating and firing steps at 14 and 16, respectively, and then, the fired metal lands are nickel-plated and then dipped in a tin or a silver solder at step 18. While the solder material is molten, it is leveled in the leveling operation shown at 20.

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Reflective Lands for Use in Multilayer Ceramic Liquid Crystal Watch Dials

Multilayer ceramic techniques normally used for forming electronic modules can be employed to form liquid crystal watch dials. A digital reflective surface such as molybdenum, tungsten, etc., schematically depicted at 10, is formed by depositing the pattern at step 12 in the desired configuration on the top surface of a ceramic green sheet module. Thereafter, the module is subjected to laminating and firing steps at 14 and 16, respectively, and then, the fired metal lands are nickel-plated and then dipped in a tin or a silver solder at step 18. While the solder material is molten, it is leveled in the leveling operation shown at 20.

After cooling, the metal is burnished, peened, or otherwise polished to increase the reflectivity of the digital display at finishing step 22. If desired, the display may be coated with a transparent shown at 20.

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