Passivation Glass

Customizable granularities to meet your specific needs

Zinc-based glass maintains stable surface charge density during BT treatment with DC bias and temperature, ensuring highly reliable devices. Additionally, lead-based glass offers exceptional chemical durability, making it ideal for transistors, thyristors, and diodes that form electrodes with nickel plating.

Properties

Properties

Properties/Glass cord			GP-014	GP-031	GP-5210	GP-180	GP-190	GP-200	GP-230
Particle size^＊1			350	350	350	S	S	S	S
Coefficient of thermal expansion	30～300℃	×10^-7/K	43	36	33	44.5	43.5	44	41.5
Transition point		℃	550	535	550	590	620	595	610
Softening point		℃	650	635	635	775	810	780	830
Density		×10³kg/m³	3.78	3.93	3.84	3.87	3.81	3.78	3.58
Alkali content	Na₂O	ppm	≦20	≦20	≦20	≦30	≦30	≦30	≦30
	K₂O	ppm	≦10	≦10	≦10	≦10	≦10	≦10	≦10
	Li₂O	ppm	≦5	≦5	≦10	≦10	≦10	≦10	≦10
Application (reverse breakdown voltage level)^*2			Low pressure	Low pressure	High pressure	Medium pressure	Medium pressure	Medium pressure	Medium pressure
Surface charge density^*3		×10¹¹/cm²	0～+1	0～+1	+6～+7	+7～+8	+15～+16	+6～+7	+7～+8
Composition system			ZnO・B₂O₃・SiO₂	ZnO・B₂O₃・SiO₂・PbO		PbO・SiO₂・Al₂O₃

Properties/Glass cord			GP-605	GP-620	GP-350	GP-370	GP-380	GP-390
Particle size^＊1			S	S	S	S	S	S
Coefficient of thermal expansion	30～300℃	×10^-7/K	44	43	46.5	42.0	44.5	43
Transition point		℃	590	620	470	475	535	540
Softening point		℃	790	810	645	680	740	740
Density		×10³kg/m³	3.84	3.76	3.53	3.32	3.61	3.54
Alkali content	Na₂O	ppm	≦30	≦30	≦30	≦30	≦30	≦30
	K₂O	ppm	≦10	≦10	≦30	≦10	≦10	≦10
	Li₂O	ppm	≦10	≦10	≦10	≦10	≦10	≦10
Application (reverse breakdown voltage level)^*2			High pressure	High pressure	Low pressure	Medium pressure	Medium pressure	High pressure
Surface charge density^*3		×10¹¹/cm²	+11～+12	+14～+15	+2～+3	+5～+6	+6～+7	+14～+15
Composition system			PbO・SiO₂・Al₂O₃		PbO・B₂O₃・SiO₂・Al₂O₃

350: Dmax 44µm, D50 16µm; S: Dmax 44µm, D50 7.5µm
Comparison based on our internal criteria. Please use this as a reference for selecting glass.
Silicon side