DE1266607B - Process for the production of light-absorbing, colored, transparent layers on a carrier by vapor deposition in a vacuum - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

C 23 c

German class: 48 b -13/04

Number: 1266 607

File number: N 22140 VI b / 48 b

Filing date: September 26, 1962

Open date: April 18, 1968

The invention relates to a method for producing light-absorbing, colored, transparent layers by simultaneous vapor deposition of several, in particular inorganic substances forming these layers onto a support by vapor deposition from separate crucibles in a vacuum of 10 ^-3 mm Hg or less. Such a method, in which inorganic compounds, in particular certain metal oxides and sulfides, are used, is known per se. However, the number of inorganic compounds which are light-absorbing in the visible region and which are suitable for this purpose is small.

It is also known to use a light-absorbing layer to be applied to a spectacle lens, which consists of a mixture of the absorbing inorganic substance with one in a different spectral range or not at all absorbent inorganic material, by simultaneous evaporation of the to apply both components from two separate evaporators.

It has now been found that light-absorbing, colored, transparent layers are also obtained in this way can be that the simultaneous vapor deposition using one or more organic, Color compounds heated to 200 to 1000 ° C and an inorganic one, heated to 1000 to 2000 ° C heated substance is made. Such a process enables transparent layers with to produce practically any desired absorption in the visible area. The layers obtained are crystal clear and have a high resistance to rubbing and scratching, with the organic compounds above be protected from atmospheric influences and solvents. A colored, organic, non-decomposing compound when carrying out the process or an organic compound to be used. The parts of the compound released during evaporation evaporate in the atmosphere while under normal pressure and temperature conditions solid dye is deposited on the carrier.

In particular, those compounds which can be used as inorganic substances are those which occur during over-evaporation can deliver bright layers and absorb little or no light in the visible area. Such substances are z. B. silicon monoxide, cryolite, magnesium fluoride and titanium dioxide. As organic, colored compounds can be z. B. azo dyes, phthalocyanine compounds, fox mab derivatives and the like.

In a further embodiment of the method according to the invention, several methods for producing light-absorbing,
colored, transparent layers on one
Support by vacuum evaporation

Applicant:

N.V. Philips' Gloeilampenfabrieken, Eindhoven

(Netherlands)

Representative:

Dipl.-Ing. H. Auer, patent attorney,

2000 Hamburg 1, Mönckebergstr. 7th

Named as inventor:

Johannes van der Wal, Emmasingel, Eindhoven

(Netherlands)

Claimed priority:

Netherlands of September 29, 1961 (269 743)

layers on top of one another that change the color compounds that result in joint evaporation be vaporized. Through the interaction of two or more colored ones that are vapor-deposited on top of one another Layers can be used to achieve a desired color. It is also possible to apply a Metal layer, for example made of aluminum, silver, to be vapor-deposited.

The method according to the invention is suitable for coating flat as well as for Coating curved surfaces. This way you can use colored lenses, mirrors and light filters be generated. The method can also be used for decorative purposes.

The layers can be vapor-deposited on glass, quartz, plastics or other materials, provided that these do not decompose under the applied vacuum.

The new method is explained in more detail with an example using the drawing.

F i g. 1 shows in cross section a vacuum chamber in which the method according to the invention is carried out can be;

Fig. 2 shows on an enlarged scale a section through a transparent layer through the inventive method is obtained.

809 539/346

In Fig. 1, the vacuum chamber 1 is shown, which consists of a flat plate 1 with attached Bell 2 consists and which is connected by a pipe 3 to a vacuum pump, not shown, through which the chamber can be vented. A support frame 4 is provided in the vacuum chamber, are mounted on the two crucibles 5, which can be heated electrically by the heating coils 7, whose Current conductors 8 are passed through the plate 1 to the outside. The crucibles contain each substance to be evaporated, namely an organic compound 9, e.g. B. a dye, and an inorganic Binder 10. The crucibles can be covered by porous plates 15, whereby spraying of the heated material is prevented. On the base plate 1 there is also a support rod 12 for an arm 13 attached to which by clamping members 14 of the carrier to be coated with the transparent layer 11 can be attached.

20th

Embodiment 1

For the vapor deposition of a blue, transparent layer, an appropriate amount of phthalocyanine blue was placed in one of the crucibles, while the other crucible was filled with silicon monoxide. After venting the vacuum chamber to a vacuum of 10 ~ ⁴ mm Hg, the phthalocyanine was vapor deposited at a temperature of about 1000 ° C, while the Siliciummonoxyd was heated to a temperature of about 1200 ⁰ C to the support U in the form of a flat glass plate. A perfectly light blue filter was obtained in this way. The intensity of the absorption of the layer can be regulated by vapor deposition of a thinner or thicker layer or by changing the concentration of the substances in the layer by means of the vapor deposition rate.

Fig. 2 shows a section through the filter produced in this way; the carrier 11 is with a Layer 16 covered, consisting of the inorganic compound 10 with the embedded particles of the organic Color connection 9 exists.

Embodiment 2

In the same manner as in Example 1, a number of azo dyes were evaporated, namely the commercially available dyes fat red HRR, 5 B and G and fat orange G, fat yellow 3 G, fat brown RR. The evaporation temperature of the organic compounds in these cases was about 600 ° C. Both with magnesium fluoride (evaporation temperature about 1300 ° C), silicon monoxide (1200 ° C) as light layers were also obtained as an inorganic compound cryolite (1100 ° C).

Embodiment 3

The color of the vapor-deposited transparent layer does not need the color of the organic one To match dyes per se.

For example, when indanthrene brilliant green (dimethoxydehydrodibenzanthrone) was evaporated, a Blue filter received.

Embodiment 4

A blue, transparent layer was obtained by according to the method of the invention Victoria blue was vaporized.

Claims (3)

Patent claims: 1. A process for the production of light-absorbing, colored, transparent layers by simultaneous vapor deposition of a plurality of these layer forming, in particular inorganic substances on a support by vapor deposition from separate crucibles in a vacuum of 10 ~ ³ mm Hg or less, characterized in that the simultaneous vapor deposition under Use of one or more organic ^{color compounds heated to 200 to 1000 0} C and an inorganic ^{substance heated to 1000 to 2000 0} C is carried out. 2. The method according to claim 1, characterized in that several with respect to the layers on top of one another that change color compounds that result in joint evaporation be vaporized. 3. The method according to claim 1, characterized in that a metal layer on the color layer is vaporized. Considered publications:
German patent application ρ 53002IX a / 42 h D
(announced on November 9, 1950). 1 sheet of drawings 809 539/346 4.65 © Bundesdruckerei Berlin