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Capacitive pressure sensor with reference capacitors and method for obtaining same

Authors: Sacristán-Riquelme, Jordi; Bohórquez Reyes, Juan Carlos; Segura-Quijano, Fredy; Achury Florian, Álvaro Uriel; Unigarro Calpa, Edgar Alberto; Ramírez Rodríguez, Fernando;

Capacitive pressure sensor with reference capacitors and method for obtaining same

Abstract

[EN] The invention relates to a capacitive pressure sensor (1) with reference capacitors (13, 13'), which comprises a vacuum-sealed hermetic cavity (12) disposed on an insulating layer into which are inserted a first sensor electrode (9) and two reference electrodes (10, 10') that do not increase the total area of the sensor. A second sensor electrode (8) integrated into a flexible membrane covers the cavity (12). When an external force deforms the membrane, the capacitor (7) between the electrode sensors (8) and (9) varies, while the capacitors (13, 13') between the electrode (8) and the reference electrodes (10, 10') serve as a reference, so that the deformation of the membrane close to the electrodes (10, 10') is minimal. The sensor also comprises two walls (11) that earth the electrode (8), thereby shielding the sensor against external electromagnetic interference. The method for obtaining the sensor allows the monolithic integration of same into microelectronic circuits.

[ES] Sensor de presión capacitivo con capacitancias de referencia y método de obtención del mismo. La presente invención es un sensor (1) de presión capacitivo con capacitancias de referencia (13, 13'), susceptible de ser integrado monolíticamente en un circuito microelectrónico. Este sensor (1) de presión comprende: un primer electrodo sensor (9) insertado en una capa de material aislante donde también se encuentran las capacitancias de referencia (13, 13'), dos electrodos de referencia (10, 10') separados entre ellos por el primer electrodo sensor (9), una cavidad hermética (12) sobrepuesta al primer electrodo sensor (9), dos muros de conexión (11) que confinan al primer electrodo (9), a los dos electrodos de referencia (10, 10') y a la cavidad hermética (12), en donde esta cavidad hermética (12) está cubierta por un segundo electrodo sensor (8) que cuando es deformado por una fuerza externa varía la capacitancia.

Consejo Superior de Investigaciones Científicas (España), Universidad de los Andes

A1 Solicitud de patente con informe sobre el estado de la técnica

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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OpenAIRE UsageCountsViews provided by UsageCounts
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