A method of providing a deformation-resistant substrate for growing a layer in a direction of growth in a reactor on the deformation-resistant substrate, the method comprising the steps of:
- measuring an internal stress value of a monocrystalline raw substrate in a radial direction perpendicular to the direction of growth;
- determining, based on the measured internal stress value, a radial size for the deformation-resistant substrate in the radial direction and an axial size for the deformation-resistant substrate in the direction of growth;
- and
- providing the deformation-resistant substrate by selecting a deformation-resistant substrate with the determined radial size and the determined axial size.