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Sensors with hermetic coating

A sensor and sensor element technology, applied in coatings, instruments, electrical solid devices, etc., can solve problems such as expensive materials, interference of electronic components, fault current leakage current, etc.

Active Publication Date: 2018-04-24
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, components of the outer housing are able to reach the interior, which can have disturbing effects on electronic components
Especially at relatively small sensor sizes, where the spacing between the printed conductors of the lead frame and between the electrical contacts is relatively small, this can cause fault currents and leakage currents
[0004] It is known that these potential obstacles can be avoided by selecting relatively high value housing materials, most of which are relatively expensive

Method used

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  • Sensors with hermetic coating
  • Sensors with hermetic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 and figure 2 One embodiment of a sensor is shown respectively, said sensor comprises a lead frame 3 on which electronic components not shown are respectively arranged, said electronic components are embedded in the first inner housing 1 and the second inner housing 2 . Furthermore, by way of example, sensor elements and signal processing circuits are arranged and embedded in the first inner housing 1 , and capacitors are arranged as electronic protection elements in the second inner housing 2 .

[0028] exist figure 1 In this case, the first inner housing 1 and the second inner housing 2 are completely sealed by the coating 4, wherein the coating 4 is completely continuous or in one piece except for the ends of the two lead frame legs 7 The ground covers the lead frame, and if the lead frame 3 protrudes outward from the inner housings 1 and 2, the lead frame legs serve to electrically contact the sensor.

[0029] The first inner housing 1 has a leadframe o...

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PUM

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Abstract

The invention relates to a sensor comprising at least a first inner housing (1) in which a sensor element is at least partially embedded, the sensor element being arranged on a lead frame (3), wherein the The at least first inner housing (1) is at least partially embedded in the outer housing, characterized in that at least the first inner housing has at least a partial coating (4).

Description

technical field [0001] The invention relates to a sensor according to the preamble of claim 1 and a method for producing a sensor according to the preamble of claim 10 . Background technique [0002] Speed ​​sensors are known, for example from patent document EP 0 889 774 B1 which discloses a wheel speed sensor comprising a lead frame equipped with a sensor element and a signal processing circuit. On the lead frame, the sensor element and the signal processing circuit are embedded in a first inner plastic housing with positioning elements for positioning in the injection mold, wherein the positioning elements have melted ribs, the The melting ribs are tightly connected to the outer plastic shell in which the first inner plastic shell is embedded. [0003] Such outer housings, for example made of thermoplastics, especially if their housing walls have a relatively low material hardness, sometimes tend to absorb moisture and penetrate into the interior. In addition, component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D11/24B29C45/14H01L23/31B29C45/16
CPCB29C45/14655G01D11/245H01L23/3135H01L23/3107B29C45/1657B29C45/1671H01L2924/0002H01L2924/00
Inventor T·尧赫S·乔纳斯J·察霍T·鲁道夫T·菲舍尔
Owner CONTINENTAL AUTOMOTIVE TECH GMBH