摘要:
A physical quantity sensor for detecting a physical quantity includes: a first substrate having a first physical quantity detection element; a second substrate having a second physical quantity detection element, wherein the second substrate contacts the first substrate; and an accommodation space disposed between the first substrate and the second substrate. The first physical quantity detection element is disposed in the accommodation space. The first physical quantity detection element is protected with the first substrate and the second substrate since the first physical quantity detection element is sealed in the accommodation space.
摘要:
A physical quantity sensor for detecting a physical quantity includes: a first substrate having a first physical quantity detection element; a second substrate having a second physical quantity detection element, wherein the second substrate contacts the first substrate; and an accommodation space disposed between the first substrate and the second substrate. The first physical quantity detection element is disposed in the accommodation space. The first physical quantity detection element is protected with the first substrate and the second substrate since the first physical quantity detection element is sealed in the accommodation space.
摘要:
A physical quantity sensor for detecting a physical quantity includes: a first substrate having a first physical quantity detection element; a second substrate having a second physical quantity detection element, wherein the second substrate contacts the first substrate; and an accommodation space disposed between the first substrate and the second substrate. The first physical quantity detection element is disposed in the accommodation space. The first physical quantity detection element is protected with the first substrate and the second substrate since the first physical quantity detection element is sealed in the accommodation space.
摘要:
A physical quantity sensor for detecting a physical quantity includes: a first substrate having a first physical quantity detection element; a second substrate having a second physical quantity detection element, wherein the second substrate contacts the first substrate; and an accommodation space disposed between the first substrate and the second substrate. The first physical quantity detection element is disposed in the accommodation space. The first physical quantity detection element is protected with the first substrate and the second substrate since the first physical quantity detection element is sealed in the accommodation space.
摘要:
In an improved semiconductor pressure sensor adapted to detect a pressure of a measured medium such as a refrigerant used in a refrigerating cycle for an automobile, there are provided a sensing portion composed of a glass support plate and a silicon substrate disposed thereon and provided with a diaphragm portion displaceable in accordance to a pressure of the measured medium at such a position of the silicon substrate as to be brought into contact with the measured medium, a detecting means disposed within the sensing portion so as to detect a displacement of the diaphragm portion, a housing having an interior space including an accommodation portion for accommodating the sensing portion and having at least a predetermined portion of the accommodation portion made up of metal as opposed to the sensing portion, and a solder glass provided between the predetermined portion of the housing and a predetermined portion of the sensing portion so as to hermetically seal the interior space of the housing with respect to said measured medium. In another aspect of the invention, the housing holds the sensing portion in such a projecting manner as to enable the diaphragm portion to be put into the flow of the measured medium.
摘要:
A semiconductor pressure sensing apparatus includes a metallic stem having a diaphragm and a semiconductor sensor bonded to the diaphragm. The semiconductor sensor includes a gauge section and first and second bonding pads. The gauge section is configured to be deformed according to a deformation of the diaphragm. The first and second bonding pads are respectively connected to different positions of the gauge section so that an electrical resistance between the first and second bonding pads can change with a change in the deformation of the diaphragm. The gauge section is formed to a semiconductor layer of an silicon-on-insulator substrate. The semiconductor sensor is directly bonded to the diaphragm by activating contact surfaces between the semiconductor sensor and the diaphragm.
摘要:
A semiconductor device having a membrane includes a semiconductor substrate, which has an active surface, and a membrane. A cavity is located between the active surface and the membrane and hermetically sealed. The membrane includes a first film, which has a through hole that extends through the first film, and a second film, which has been formed by reflowing a reflow layer made of a material that becomes viscous and reflows when heated. The through hole has been plugged by the second film.
摘要:
An airflow sensor including a micro-heater having a film structure, which can reduce a warpage of the film structure even when a thick ness of the film structure to improve a mechanical strength thereof. An airflow sensor is provided with a monocrystalline silicon substrate having a hollow portion therein; a thin film heater portion as a micro-heater arranged above the hollow portion; and a temperature sensor. The thin film heater portion has a laminated structure of a lower thin film, a heater layer, and an upper thin film. The lower and the upper thin film respectively have a tensile stress film and a compressive stress film laminated with the tensile stress film, and are symmetry laminated with respect to the heater layer. The tensile stress film is made up of a Si3N4 film having a great moisture-proof characteristic; and the compressive stress film is made up of a SiO2 film having a great adhesion. Since these stress films cancel their internal stress each other, the internal stress can be released, and a warpage moment can be cancelled so that a warpage of the whole film structure can be restricted. Therefore, the mechanical strength can be improved even if the thickness of the film is increased.
摘要:
In the method for manufacturing a semiconductor substrate, a concavity and a connecting hole for connecting the concavity to the outside are formed on a lower face side of a first substrate, and the first substrate is laminated with a second substrate in an atmosphere at atmospheric pressure. A diaphragm is formed by thinning the first substrate from its upper face by polishing. A sealing hole reaching to the connecting hole is formed from the upper face of the first substrate. An oxide film is formed in the sealing hole in a vacuum, whereby the connecting hole is sealed while the pressure of the pressure reference chamber is reduced to a vacuum. In this way, since the pressure reference chamber is pressure-reduced in a final stage, the diaphragm can be prevented from deforming due to pressure difference during polishing.
摘要:
White light projected from a white light source is divided into three light beams of primary colors, i.e., red, green and blue by a dichroic mirror. Three light beams projected from the dichroic mirror are made incident upon a micro-lens array and reflected on and modulated in a liquid crystal panel disposed beneath the micro-lens array. The liquid crystal panel is driven by a driver circuit which supplies color signals to the panel, thereby modulating the light beams in the panel. The modulated light beams are projected from the micro-lens array to a schlieren diaphragm which eliminates scattered light components from the light beams. The light beams then enter into a projection lens and display color images on the screen. Since light beams constituting a picture element consisting of red, green and blue colors are projected from a single micro-lens of the micro-lens array, a color image displayed on the screen has no blur among three primary colors. Since the three primary color beams are projected on the liquid crystal panel and modulated therein, only a single liquid crystal panel having no color filters is used in the display device.