3818 Chemical Elements and Compounds Doped for use in Electronics, in the Form of Discs, Wafers, Cylinders, Rods or Similar Forms, or cut Into Discs, Wafers or Similar Forms, Whether or not Polished or With a Uniform Epitaxial Coating (Excl. Elements That HavE Been Further Processed, E.g. by Selective Diffusion)

3818 (01/1988-..) Chemical Elements and Compounds Doped for use in Electronics, in the Form of Discs, Wafers, Cylinders, Rods or Similar Forms, or cut Into Discs, Wafers or Similar Forms, Whether or not Polished or With a Uniform Epitaxial Coating (Excl. Elements That HavE Been Further Processed, E.g. by Selective Diffusion) 38180010 (01/1988-..) Silicon Doped for use in Electronics, in the Form of Discs, Wafers, Cylinders, Rods or Similar Forms, Whether or not Polished or With a Uniform Epitaxial Coating (Excl. Elements That Have Been Further Processed, E.g. by Selective Diffusion) 38180090 (01/1988-..) Chemical Elements and Compounds Doped for use in Electronics, in the Form of Discs, Wafers, Cylinders, Rods or Similar Forms, or cut Into Discs, Wafers or Similar Forms, Whether or not Polished or With a Uniform Epitaxial Coating (Excl. Elements That HavE Been Further Processed, E.g. by Selective Diffusion, and Doped Silicon)