Some electronics products require because of the environmental condition (high humidity and/or temperature, presence of inorganic salts) applicatioon of such printed circuit boards for theis construction, which are covered with a special mask resistant against different kinds of fungi and mould. General requirements for solder masks for the printed-circuit boards are formulated in IPC-SM-840C "Standart - Permanent Polymer Coating (Solder Mask) for Printed Boards". A corresponding test method is described in standart: IPC TM-650 - chapter: 2.6.1.1.“Fungus Resistance – Conform Coating" - test is to be made for following kinds of Fungus:
Scientific name:                              ATCC code:
Aspergillus niger ....................................9642
Chaetomium globosum ............................6205
Gliocladium virans ..................................9645
Aureobasidium pullulans ..........................9348
Penicillium funiculosum ...........................9644
We can introduce - and apply in our PCB production - fungus resistant PCB solder masks of manufacturers: - Peters GmbH & Co., KG (Germany) - GOO CHEMICAL CO., LTD.(Japan)