Patent ID: 7631422
Filing Date: 2009-12-15
Classification: G06F,H01L,H04L,H05K,Y10T

Abstract:
1. A method of manufacturing a wiring substrate, comprising steps of: preparing an insulative substrate having thereon a stacked pair of parallel transmission lines; mounting and connecting a terminal chip resistor with the terminal ends of said stacked pair of parallel transmission lines, said terminal chip resistor having a resistance that matches the characteristic impedance of said stacked pair of parallel transmission lines to minimize the reflection of waves in said stacked pair of parallel transmission lines; preparing a sticky organic potting resin solution having a larger dielectric loss angle than said insulative substrate at least in the frequency range of digital signals to be transmitted by said stacked pair of parallel transmission lines; dropping said sticky organic potting resin solution onto said terminal chip resistor and the vicinity thereof for potting; and hardening said organic potting resin; wherein said sticky organic potting resin solution includes a thermosetting organic material containing a hydroxyl radical.