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
Image forming apparatus and job request control method instructed by authenticated users
Methods and systems for improved engine speed control during engine starting
Tablet computer
Wafer-level chip scale package
Image forming apparatus forming images in response to image formation request from operation unit or external device
Radio communication devices, information providers, methods for controlling a radio communication device and methods for controlling an information provider
Forming agent for gate insulating film of thin film transistor
  Randomly Featured Patents
Combination tackle box, bait well, and cooler
Heat radiation shield, and dewar employing same
Apparatus and system for at least recording information on or reproducing information from a card-shaped recording medium
Lockable slider for slide fasteners
Clothing deodorizer for deer hunters
Enhanced power savings for memory arrays
Vulcanizable rubber mixture and rubber products comprising the same
Image forming apparatus, image forming method, and image forming program product for processing pixels of vertical and diagonal lines expressed by input multi-value pixel data
Device for gluing the final edge of a log of a band-shaped material
Ride control apparatus and method