News and Events
The trend to finer lines and spaces continues to challenge processors of innerlayer material. With thinner core laminate and thinner copper foil, mechanical cleaning — the cleaning method of choice for years — is no longer an option.
01/30/2013–RBP Chemical Technology Inc., Milwaukee, Wis., a developer, manufacturer and distributor of high performance chemicals and consumable supplies, announced today its asset acquisition of RD Chemical Company, Mountain View, California-based RD Chemical has been supplying application-specific process chemicals for the printed circuit board, chemical milling, medical implant device, and semiconductor packaging and test equipment industries for more than 30 years.
Antifoam is unfortunately a necessary evil for developing and resist stripping spray processes. I say unfortunate because antifoams are typically petroleum- based products that we do not want on the panel.
However, the surfactants which are in the resist are dissolved into the developer or resist stripper bath and must be controlled. If this foaming isn’t controlled, it can lead to not only a mess, but a loss of spray pressure, due to pump cavitation.
Hey Rob, my tin stripper works great most of the time. However, when I run high aspect ratio boards greater than 8:1, I am seeing tin in the hole. What’s wrong?
Gas Ghosting/Chemical Ghosting
The transfer of a printed image from the front of one sheet to the back of another.
Toning is the inability to remove fine ink particles that deposit on to the non — image area of the plate.
Fountain solution does not have the ability to clean the non-image areas of the plate.
Bands of ink that form and look like rail road tracks. They appear on the roller train and may transfer and appear in the print. They may appear in rows across the sheet anywhere from the lead edge to the tail edge.