90901579
Aug 25, 2021
chemicals used in the manufacture of printed circuit boards; chemicals used in conversion coatings; chemicals for innerlayer bonding of multilayer printed circuit boards; chemicals used in oxide-free bonding coatings of metal surfaces; chemicals used in copper conversion coatings; coating chemicals used in processing thin layer electronic components; chemicals for coating copper; chemical preparations for drilling substrate surfaces in electrical components; chemicals used in coating metal surfaces through passivation
Chemicals