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EP0049007A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for the direct bonding of copper foils to oxide-ceramic substrates

Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1981-08-12
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Granted: —
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Expires: 2001-08-12
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Abstract

Abstract Translated from German Zur Erzeugung einer blasenfreien Verbindung nach dem Direct-Bonding-Verfahren zwischen einer Kupferfolie und einer glatten, polierten Keramik wird das mit der voroxidierten Kupferfolie belegte Keramiksubstrat im Vakuumofen bei einem Druck von höchstens 0,5 mbar erhitzt, wobei in der Ofenatmosphäre ein Sauerstoff-Partialdruck zwischen 0,01 und 0,5 mbar aufrecht erhalten wird. Der Vakuumofen kann über Schleusen gefüllt und geleert werden. To create a bubble-free connection using the direct bonding method between a copper foil and a smooth, polished ceramic, the ceramic substrate covered with the pre-oxidized copper foil is heated in a vacuum oven at a pressure of at most 0.5 mbar, with an oxygen partial pressure in the furnace atmosphere between 0.01 and 0.5 mbar is maintained. The vacuum oven can be filled and emptied via locks.

Inventors

  • 👤 Dietmar Dr. Berndt
  • 👤 Arno Dr. Neidig
  • 👤 Georg Dr. Wahl
  • 👤 Mark Dr. Wittmer

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 05:46
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/021; B; B23; B23K; B23K35/00; B23K35/22; B23K35/38; C04B37/023; C04B37/026; H; H05; H05K; H05K3/00; H05K3/38; H05K3/40; H05K3/4007; H05K3/4015; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/124; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/407; C04B2237/50; C04B2237/54

Claims Analysis

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References Cited (Backward Citations)

US2564738A Cited
GB761045A Cited
DE2319854A1 Cited
FR2181049A1 Cited
DE2508224A1 Cited
US3911553A Cited
DE2533524A1 Cited
US3994430A Cited
DE2633869A1 Cited
DE2746894A1 Cited

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