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Sensor Package for Restricting Insect Intrusion

IP.com Disclosure Number: IPCOM000243651D
Publication Date: 2015-Oct-07
Document File: 3 page(s) / 67K

Publishing Venue

The IP.com Prior Art Database

Abstract

Semiconductor pressure sensors have holes diameter in the range of 1 to 0 5 mm to allow air to reach pressure sensing area Soft material e g gels on top of pressure sensing element is needed to provide media resistance protection from debris and allowing the pressure to be sense accurately Insects can crawl in the pressure sensor packages through the hole Contact of insect s legs or other body parts can touch wires electrical connections through soft gels Contact can result in offset in output and or electrical failure of the pressure sensor parts

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TITLE

Sensor Package for Restricting Insect Intrusion

Semiconductor pressure sensors have holes (diameter in the range of 1 to 0.5 mm) to allow air to reach pressure sensing area. Soft material (e.g. gels), on top of pressure sensing element, is needed to provide media resistance, protection from debris, and allowing the pressure to be sense accurately. Insects can crawl in the pressure sensor packages through the hole. Contact of insect’s legs (or, other body parts) can touch wires (electrical connections) through soft gels. Contact can result in offset in output and/or electrical failure of the pressure sensor parts.

A structural modification to existing pressure sensors lids to eliminate crawling of insects in pressure sensor packages is proposed. These approached can eliminate any failure or variation in performance of pressure sensor packages by restricting the intrusion of insects in package. Three approaches are proposed to prevent inset entering the sensor packages: [1] Micro-machined lid vs large opening in lid (as shown in Figure 1); [2] Sticky pad around the opening on the lid (as shown in Figure 2); [3] Flexible Plastic Flap with slit opening (as shown in Figure 3).

Figure 1: Micro-machined lid vs large opening in lid.

Figure 2: Sticky pad around the opening on the lid.

Figure 3: Flexible Plastic Flap with slit opening.