There has been studied to attain a new concept of the whole organic substrate which combines both a new aramid-paper reinforcement and a sophisticated epoxy resin. This reinforcement was based on making the mat of an organic fibre composed of an aromaticpolyether-amide and the impregnated resin of an aromatic amine-adducted epoxy of low volatile type. It must be the meaningful trend for the substrate of future copper-clad laminate to replace the past inorganic reinforcements with an organic ones, finding its way to the progressive surface-mountable use and extending its role, as the next step, to the organic multilayer hybrid-circuit, gathering all the merit of the both past organic and inorganic substrate and also removing the demerit of them accompanied with their cost reduction. So, it should be noted that we are now meeting with the dawn of the next stage of the substrate which continues to expand to both printed and hybrid circuit industry.

ABSTRACT:Generation of static charge by friction, discharges in the course of separation from a backing metallic plate, and discharges to an approaching sphere or wire electrodes after such a separation were investigated for various cloths. In the separation procedure, a large proportion of charge was lost through discharges to the backing plate, giving a maximum charge density of about 15 pCfm2 after separation. Oscilloscopic observations of discharges in the approaching procedure revealed that charge is lost through a large number of regular Triche! pulses in the negative corona, while in the positive corona, charge is lost through pulseless glow when fine electrodes are applied; the glow gives way to large pulses as the diameter of the electrode increases. While the amount of lost charge agreed well with the total charge of the pulses and pulseless glow observed by oscilloscope in the approaching procedure, these charges did not agree in the separation procedure. This disagreement was ascribed to the small ratio of the stray capacity to the capacity between the cloth and the backing plate. However, discharges in the separation procedure were found to be similar to those in the approaching procedure by analysing the charge distribution patterns.KEY WORDS Static Electricity 1 Cloth 1 Charge Density 1 Corona Discharge I Pulse I Glow I

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A new material has been advanced for fabricating a rigid-flexible printed boards. The material includes copper-clad laminates (TL-01) and prepregs (ET-lOO)