Multiple High Voltage Pulse Stressing of Polymer Thick Film Resistors

Table 3

Resistance variation with high voltage pulses with different pulse durations of polymer thick film resistors with pulse amplitude = 260 V and pulse duration = 0.47 μs, 4.7 μs, and 47 μs for different PVC-graphite compositions.

(a) 60% graphite: 40% PVC

S. number	Pulse duration	Normalized resistance
		After 5 cycles	After 10 cycles	After 20 cycles	After 50 cycles
1	0.47 μs	0.932	0.922	0.917	0.916
2	4.7 μs	0.913	0.907	0.901	0.901
3	47 μs	0.895	0.887	0.881	0.881

(b) 90% graphite: 10% PVC

S. number	Pulse duration	Normalized resistance
		After 5 cycles	After 10 cycles	After 20 cycles	After 50 cycles
1	0.47 μs	1.157	1.160	1.160	1.160
2	4.7 μs	1.112	1.123	1.125	1.125
3	47 μs	1.092	1.115	1.119	1.121