Organic Solderability Preservative Final Finish for Printed Circuit Boards
Aspect is an organic solderability preservative developed for high temperature processing in Pb-free assembly. It is compatible with through-hole and surface mount technology. It can be used for mixed final finish, ENIG/OSP applications.
Aspect is supplied in three concentrated components, two for bath make-up and an additional component for non-regular replenishment. It contains a substituted imidazole, acetic acid and is Cu-free. Treated Cu surfaces are covered with a thin (0.2 – 0.4 micron), nearly colorless and transparent coating.
Aspect is used in a standard immersion line incorporating the chemical steps of Cleaner, Microetch, and OSP with counterflow rinses in between. Rinsing and drying between each step will prevent variations in coating thickness. It is recommended to use an acidic cleaner appropriate for a final finish, such as FinClean CR or FinClean RS from RBP, as well as a peroxide-based microetch as this chemistry creates a better surface topography for coating formation. Peroxide microetch chemistry is also more easily rinsed.
An example of such microetch is Quantum Etch from RBP. Aspect bath make-up instructions are provided in the data sheets below.
FlexClean DM is a powerful, non-foaming and free rinsing alkaline cleaner specifically formulated to clean copper on exposed alkalisensitive substrates including polyimide. It will remove oven baked residues, oxidation, fingerprints and oils, all without attack of alkali sensitive substrates or removal of any copper metal. Use of FlexClean DM will leave the copper surface bright, oxidation-free and ready for photoresist application or oxide process. FlexClean DM may be used in conjunction with an acid cleaner, or if required, a light microetch. If a microetch is used, much lower levels of metal are fully acceptable thus minimizing costs and reject rate.
A copper oxide process uniquely formulated to produce a variety of oxide coatings ranging from a very fine-grained bronzed oxide to a larger grained black oxide. MAGNABOND CO-300 provides the flexibility to manipulate the grain size allowing for processing a wide variety of dielectric materials while maintaining optimum inner-layer bonding.
An alkaline cleaner for use in the LAYERBOND 2000 adhesion promoter process. PREPBOND provides complete surface preparation for this process, eliminating the need for a microetch. It completely removes residues from Resist Stripper, and is extremely effective for removing handling soils and fingerprints. For spray, flood and soak applications.