Patent ID: 8576043
Filing Date: 2013-11-05
Classification: H01C,Y10T

Abstract:
1. A surface-mount type over-current protection element, comprising: two single-layer PTC multiple chips ( 10 ) ( 10 ′), the chip ( 10 ) is made up of the first PTC chip material ( 12 ) the first metal foil layer ( 11 ) and the second metal foil layer ( 13 ), which are pasted on both surfaces of the first PTC chip material ( 12 ), the other chip ( 10 ′) is made up of the second PTC chip material ( 16 ) the third metal foil layer ( 15 ) the fourth metal foil layer ( 17 ), which are pasted on both upper and lower surfaces of the second PTC chip material ( 16 ), comprising: There is the third insulation layer ( There are the etching figures ( There is the isolating layer ( The first insulation layer ( The first insulation layer ( The second insulation layer ( There are the copper plates ( There is the inner through hole ( There are the end through holes ( There are the blind holes ( There are metallic conductors being located on the inner surface of the inner through hole ( The first metallic conductor ( The third metallic conductor ( The second metallic conductor ( The fourth metallic conductor ( The fifth metallic conductor ( The fourth insulation layer ( The fifth insulation laver (