Method for manufacture of a refracting, light permeable oxide layer

• US 3,900,609 A
• Filed: 06/04/1973
• Issued: 08/19/1975
• Est. Priority Date: 04/13/1970
• Status: Expired due to Term

• Current Assignee: Baptist Wille
• Original Assignee: Baptist Wille
• Inventors: Wille, Baptist
• Primary Examiner(s): Kendall, Ralph S.
• Assistant Examiner(s): Pitlick, Harris A.
• Application Number:
  US05/366,482
• Time in Patent Office: 806 Days
• Field of Search: 117/16R,169R,33.3,221
• US Class Current: 427/166
• CPC Class Codes: C03C 17/245 by deposition from the vapour phase
• CPC Class Codes: C03C 2217/23 Mixtures
• CPC Class Codes: C03C 2218/15 from the vapour phase
• CPC Class Codes: C03C 2218/151 by vacuum evaporation
• CPC Class Codes: C23C 14/083 of refractory metals or yttrium
• CPC Class Codes: G02B 1/105 Protective coatings
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings

Abstract

A highly refracting, light permeable oxide layer on a support, such as a glass plate, comprises oxygen, zirconium and tantalum, the ratio of the number of tantalum atoms to zirconium atoms being in the range of about 1 : 1 to 1 : 2. The application also discloses a method for producing highly refracting, light permeable oxide containing layers on supports, such as of glass, wherein a mixture of metals and/or metal oxide is heated under vacuum conditions to form a vapor which is condensed on the support to form a deposit or layer thereon. According to the inventive method, the mixture which is subjected to the vaccum deposition comprises zirconium and tantalum in metallic or oxidic form, at least one of the tantalum or zirconium, however, being present in oxide form.

Claims

1. A METHOD OF PRODUCING A HIGHLY REFRACTIVE, LIGHT PERMEABLE OPTICALLY HOMOGENEOUS LAYER ON A SUPPORT, SAID LAYER ESSENTIALLY CONSISTING OF OXYGEN, ZIRCONIUM AND TANTALUM, THE RATIO OF THE NUMBER OF TANTALUM ATOMS TO ZIRCONIUM ATOMS IN THE LAYER BEING IN THE RANGE OF 1 :

1.36 TO 1 ;

1.7 AND THE LAYER BEING ESSENTIALLY DEVOID OF CRYSTALLINE ZIRCONIUM OXIDE, WHICH COMPRISES HEATING UNDER VACUUM CONDITIONS A MIXTURE COMPRISING AT LEAST 20 PER CENT BY WEIGHT OF METALLIC TANTALUM AND AT LEAST 20 PERCENT BY WEIGHT OF ZIRCONIUM OXIDE AND IN AMOUNTS NECESSARY TO OBTAIN SAID RATIO THEREBY TO FORM A VAPOR, AND CONDENSING THE VAPOR ON SAID SUPPORT.

2. The method of claim 1, wherein the mixture Essentially consists of metallic tantalum and zirconium oxide in a ratio of 30 :

70 to 70 ;

30.

3. The method as claimed in claim 1, wherein said mixture essentially consists of 50% of metallic tantalum and 50% of zirconium oxide.

4. The method as claimed in claim 1, wherein said vapor formation and condensation are carried out in an oxidizing atmosphere.

5. The method as claimed in claim 1, wherein said support is a glass plate.

6. The method as claimed in claim 1, wherein said support is preheated prior to the formation of said deposit thereon.

7. The method as claimed in claim 6, wherein said glass plate is heated to about 300*C prior to said deposition.