Patent ID: 6238749
Filing Date: 2001-05-29
Classification: B82Y,C23C,G02F,H05K

Abstract:
A method of providing a metal pattern on an electrically insulating substrate in an electroless process, in which method the substrate is pretreated and subsequently exposed to light according to a pattern, whereafter the substrate is brought into contact with an aqueous metal salt solution to metallize unexposed areas of the substrate, thereby forming the metal-pattern on the substrate, characterized in that the substrate is a glass substrate and is pretreated by bringing it into contact with an aqueous Sn free Pd sol which is stabilized with a water-soluble polymer, thereby depositing Pd nuclei on the substrate, and in that the substrate, thus provided with the Pd nuclei, is exposed according to the pattern to a pulsed laser light beam of such energy content per pulse that the Pd nuclei are removed from the exposed areas and in that an electroless metallization bath is used to metallize the unexposed areas of the substrate thereby forming the metal pattern on the substrate.