The cause of blisters
Blisters are local separations between the layers of the base material,and are caused by the following reasons:Underetching of adhesive coating,Overactivity of electroless plating bath,Poor rinsing of adhesive etch,Overactivity of acceleration step,Incomplete removal of resist material,Large copper areas and Poor adhesive of electroless to base materail.PCB Manufacturers should take some effective measures to prevent these quality issues as:Increase degree of each by time,temperature or concerntration;Decrease activity of electoless plating;Check level of activator;Increase rinsing;Decrease activity of accleration step;Check imaging operation;Relief by cross hatching;Check swell/etching process.
The cause of blistersBlisters are local separations between the layers of the base material,and are caused by the following reasons:Underetching of adhesive coating,Overactivity of electroless plating bath,Poor rinsing of adhesive etch,Overactivity of acceleration step,Incomplete removal of resist material,Large copper areas and Poor adhesive of electroless to base materail.PCB Manufacturers should take some effective measures to prevent these quality issues as:Increase degree of each by time,temperature or concerntration;Decrease activity of electoless plating;Check level of activator;Increase rinsing;Decrease activity of accleration step;Check imaging operation;Relief by cross hatching;Check swell/etching process.
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