Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Process for bonding copper or copper-chromium alloy to ceramics, and bonded articles of ceramics and copper or copper-chromium alloy










Image Number 4 for United States Patent #4500383.

A process for bonding a copper or copper-chromium alloy body and a ceramic body of components of an electrical or electronic device to each other includes a step of directly sandwiching a layer of chromium oxide between the ceramic and copper or copper-chromium bodies, a step of heating a temporary assembly of the ceramic and copper or copper-chromium alloy bodies and the layer of chromium oxide, under an atmosphere which can oxidize chromium without oxidizing copper, at a temperature of at least 900.degree. C. but below the melting point of copper or the alloy, and then a step of slowly cooling the resulting bonded assembly. In particular, in a process for bonding the alloy body to the ceramic body, the chromium oxide sandwiching step is performed concurrently with the temporary assembly heating step. The bonding process can produce a hermetic envelope, particularly a vacuum envelope of a vacuum interrupter. The process for bonding the copper or alloy body to the ceramic body of this invention is more advantageous than bonding processes employing the so-called Telefunken method, in terms of cost and steps.








 
 
  Recently Added Patents
Power control arrangement for long term evolution time division duplex method and apparatus
Light-emitting device package and method of manufacturing the same
System, method, and computer program product for determining whether an electronic mail message is compliant with an etiquette policy
Aisle barrier
Stool
Wrench
Dehumidifier
  Randomly Featured Patents
Toilet
Burner with air flow adjustment
Aerosol container closure
Preparation of polyamide with mixture of phosphorus catalysts
Transmission line shorting switch
Steering column of vehicle
Liquid crystal alignment structure
Cationic acylpyridinium derivatives for use as bleach activators
Structure and method of making combination proximity/insertion identification cards
Sprinkler head