Method for coating substrates and mask holder
First Claim
1. A method for coating substrates by means of physical vapour deposition (PVD) and/or chemical vapour deposition (CVD) having any coating thickness distributions, especially for manufacturing optical single-layer or multi-layer systems for the visible, extreme ultraviolet and x-ray wavelength ranges, in which between at least one substrate to be coated and at least one particle source at least one mask is provided, characterised in that a mask with i>
- 1 apertures is used, whose position on the mask surface is described by the family of vectors pi=ni1v1+ni2v2 and whose area is a function of the position, wherein the family of vectors depends on the desired thickness distribution, i is a natural number, ni1 and ni2 are integers and v1, v2 and pi are vectors;
relative motion is accomplished between mask and/or substrate and/or particle source.
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Accused Products
Abstract
When coating substrates it is frequently desired that the layer thickness should be a certain function of the position on the substrate to be coated. To control the layer thickness a mask is conventionally arranged between the coating particle source and the substrate. This leads to undesirable shadow effects. In addition, is has so far only been possible to obtain rotationally symmetrical thickness distributions. It is now proposed that masks should be used having apertures aligned according to a regular grid on the mask surface. Such a mask with a mask holder comprising a base frame (2), an intermediate frame (3) and a mask frame (4) which are joined one to the other by means of double hinges (5a, a′, b, b′), is moved arbitrarily in the mask plane. By this means arbitrary thickness distributions can be achieved when coating substrates at reasonable cost.
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Citations
19 Claims
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1. A method for coating substrates by means of physical vapour deposition (PVD) and/or chemical vapour deposition (CVD) having any coating thickness distributions, especially for manufacturing optical single-layer or multi-layer systems for the visible, extreme ultraviolet and x-ray wavelength ranges, in which between at least one substrate to be coated and at least one particle source at least one mask is provided, characterised in that
a mask with i> - 1 apertures is used, whose position on the mask surface is described by the family of vectors pi=ni1v1+ni2v2 and whose area is a function of the position, wherein the family of vectors depends on the desired thickness distribution, i is a natural number, ni1 and ni2 are integers and v1, v2 and pi are vectors;
relative motion is accomplished between mask and/or substrate and/or particle source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- 1 apertures is used, whose position on the mask surface is described by the family of vectors pi=ni1v1+ni2v2 and whose area is a function of the position, wherein the family of vectors depends on the desired thickness distribution, i is a natural number, ni1 and ni2 are integers and v1, v2 and pi are vectors;
Specification