Resources Contact Us Home
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 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
Inductive signal transfer system for computing devices
Managing multiple web services on a single device
Method for manufacturing photoelectric conversion device
Wireless refrigerant scale platform
Traffic signal mapping and detection
Method and system for leveraging the power of one's social-network in an online marketplace
Group of amino substituted benzoyl derivatives and their preparation and their use
  Randomly Featured Patents
Process for the pyrolytic dehydrochlorination of haloalkanes in the presence of an initiator based on chlorinated product and the initiator employed in such a process
Weigh plate quick release mount
Method and apparatus for encoding and decoding and multi-view image
Current-limiting circuit
Peptide compositions which induce immune tolerance and methods of use
Method for forming an integrated circuit
Counter/divider apparatus
Method and apparatus for improving swimming pool skimmer efficiency
Trocar button
Anti-theft device for motor vehicles