Adhesiveless bonding

Fluorinated surfactants added to rubber (SKF 26) allows adhesiveless bonding to steel [11]. 

Produce copper-LCP 2. Vacuum press for adhesiveless copper bond... 

The flame-retardant properties of the laminates depend on the composition of the adhesive materials used by each manufacturer. Usually, a normal flame-retardant component in an adhesive resin has a negative effect on bonding. Several adhesive resins contain organic bromine molecules as the flame-retardant components, and will be eliminated for the ecological concerns. (For a discussion of this issue, see Chap. 6.) As soldering temperatures increase, heat-resistant adhesives or adhesiveless laminates systems are required. 

Cast-Type Adhesiveless Laminates. The cast-type adhesiveless laminates have a good cost/performance balance. They have a high bond strength between substrate layers and conductor foils. They can also use special conductors such as copper alloy, nickel, stainless... 

A wirebonding process similar to COB has been applied for high-density flexible circuits without serious changes. Due to the high heat resistance of new adhesiveless laminates, standard bonding materials and equipment for flexible circuits can be used (see Fig. 64.6). 

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