Method for applying a moistureproof coating to printed circuit boards using triangular or dovetail shaped liquid film emitted from a flat-pattern nozzle
CA 1328783 C · Owner: Nordson Corporation · Inventors: Shimada, Takaji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mask-free method is disclosed for applying a moisture-proof insulative coating to selected areas of a printed circuit board without applying the coating to regions that are to remain uncoated. This method includes the step of supplying the insulative liquid coating to a flat-pattern nozzle means at a pressure to produce a liquid film emission in a flat triangular shaped pattern with a lower horizontal base edge an upper apex, and substantially free of atomized particles of coating. The nozzle means and a circuit board are positioned at a specific distance relative one another to place the board in the path of the flat triangular shape liquid film pattern. Relative movement between the …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.