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
Dihydronaphthyridinyl(organo)methanone analogs as positive allosteric mGluR5 modulators
Device to facilitate moving an electrical cable of an electric vehicle charging station and method of providing the same
Electronic device, display, image processing apparatus and electronic calculating apparatus
Nanogap device for field enhancement and a system for nanoparticle detection using the same
Image processing apparatus, remote management system, license update method, and computer program product
Positive electrode for secondary battery, and secondary battery
Liquid low temperature injection molding process
  Randomly Featured Patents
Methods and apparatus for providing search results in response to an ambiguous search query
Wet extractor system
Digital modem
Method of and apparatus for measuring speed
Communications system with a single protection loop
Reducing vortex densities and transporting vortices in superconductors
Sports footwear with improved flexibility
Electrical apparatus
System and method therefor of preventing fraud on pay phone credit/debit calling card authorization
Shutter calibration and document size detection