CAC® cleanroom in a box
Delivering higher yields in every package
Copper Foil with an Aluminum Separator Sheet
CAC® (Copper Aluminum Copper) is a thin aluminum separator with an impressive difference … it is sandwiched between two sheets of copper foil, which pre-seals the critical copper surfaces from exposure to airborne particles and resin dust.
During multilayer lamination, the copper foil releases from the aluminum separator sheet and becomes the outer layer foil for the printed circuit board, above and below. Our proprietary process ensures that the copper surfaces are free of any particles or dents five microns or larger. The net result is consistently higher yields on high density, fine line and gold feature circuit boards. Costly manual handling and cleaning steps are eliminated, which reduces labor costs and improves cycle time and throughput during the lay-up process.
CAC® is also the best and most economical solution for using difficult-to-handle thin foils, reverse treated and double treated copper foils.
CAC® Lamination Foil
Our product is available in a double-sided version known as CAC Lamination Foil (with copper foil on both sides of the aluminum separator), as well as in a single-sided version (as CA Lamination Foil and AC Lamination Foil).
CAC® sheets can be supplied in varying sizes with and without registration holes according to the widespread varieties of customer specifications.
We select the best aluminum alloys for use as CAC® lamination separators. All aluminum used is optimized, to meet the demanding requirements of today’s lamination and drilling processes. Also, the solid Aluminum Foil is available separately for drilling and lamination needs.
Our expert team is here to assist with all questions and considerations.
In the same ten-high lay-up, operators must wipe 40 surfaces to ensure the best possible surface cleanliness. Because CAC, Inc. delivers CAC pre-sealed from the factory, operator cleaning of critical surfaces is no longer necessary. The combined productivity gains are typically 30% to 50%.
Because the foil is attached to a rigid separator, CAC with thin foils, 9 µm (0.25 oz) or 12 µm (0.375 oz), significantly eases creation of fine lines and spaces as small as 50 µm (0.002″).
Handling and registration of thin copper foil onto lamination fixture pins can cause handling wrinkles, a major source of foil pinholes. Another source of foil wrinkles, thermal expansion mismatch between copper foil and steel separators, is eliminated by the use of aluminum separators.
The use of CAC® can reduce inherent temperature differences in a lamination book due to its improved thermal conductivity as compared to steel separators.