Appeal No. 2002-0510 Page 3
Application No. 09/139,309
The appellants' invention comprises embodiments of a variable voltage
protection component for placement between a ground plane (14) and an electronic
circuit (10). Figure 2 of their specification shows an embodiment featuring a variable
voltage material layer (13) and a neat dielectric polymer or glass layer (12). According
to the appellants, use of the neat dielectric polymer or glass layer (12) improves clamp
voltage properties. (Id.)
Figure 3 of the specification shows a multi-layer embodiment. Three distinct
layers (15, 16, 17) of variable voltage material, each layer having a different material
composition, are included. More specifically, the loading of conductive or
semiconductive particles dispersed within the resin constituting the variable voltage
material is varied from layer to layer. This variation is described in terms of percentage
of particles by volume. The appellants assert that such variation achieves a wide range
of clamping voltages. (Id.)
A further understanding of the invention can be achieved by reading the following
claims.
5. A variable voltage protection component for placement between
a ground plane and an electronic circuit comprising:
a layer of variable voltage material comprising a binder containing
conductive particles and/or semiconductive particles; and
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