摘要:
An inexpensive, accurate, and reliable semiconductor physical quantity sensor having improved resistance to noise is provided, wherein pads that have been pulled down to ground inside a semiconductor chip are arranged closer to a ground pad, while pads and that have been pulled up to a power supply inside the chip are arranged closer to a power supply pad. Of the digital input/output pads that have undergone digital trimming to obtain a predetermined output, the pulled-down pads and the ground pad are electrically connected to a ground terminal outside the chip via internal exposed portions, wires, and a ground-connecting external wire. The pulled-up pads and the power supply pad are electrically connected to a power supply terminal outside the chip via the internal exposed portions, the wires, and a power-supply-connecting external wire. Terminals may be electrically connected together on a package or a mounting substrate.
摘要:
A semiconductor pressure sensor chip is housed in a pressure detecting chamber, and a pressure port is provided which causes the pressure detecting chamber and a space in which pressure is to be measured are in communication with each other. A protective portion is provided inside the pressure port in such a manner as to substantially close an inlet of the pressure detecting chamber in the state in which the pressure detecting chamber and the space in which pressure is to be measured are in communication with each other. This prevents degraded and solidified foreign matter such as oil and gasoline, which are led into the pressure port from the space in which pressure is to be measured, from entering the pressure detecting chamber and colliding with the sensor element and the like.
摘要:
A pressure sensor apparatus and a pressure sensor housing are provided that are capable of preventing the occurrence of frozen moisture, swelling of a gel-like coating member and damage of a pressure sensor element without accumulating moisture, oil, gasoline or the like on a protective wall even when the pressure sensor apparatus is disposed obliquely. The protective wall prevents entry of foreign matter into the pressure detection chamber, or a pressure sensor housing of the pressure sensor apparatus. The protective wall has an inclined surface that is provided with an angle θ8a in which a second angle θ2 is acquired between a horizontal line HL and the inclined surface that slopes downward when the pressure sensor apparatus is disposed obliquely by a first angle θ1 with respect to the horizontal line HL.
摘要:
A pressure sensor device includes a pressure sensor cell that includes a sensor chip having a diaphragm with piezo-resistors, an amplifying circuit, and various adjusting circuits, and a base member to which the sensor chip is joined, with the diaphragm facing a through hole of the base member. The base member and a metallic member are joined together with a joining member so that their respective through holes communicate with each other. A protective film or filler covers the joining member between the base member and the metallic pipe member. The metallic pipe member is bonded to a resin case, and a signal terminal of the resin case and the pressure sensor chip are electrically connected together by wire bonding, thus forming a pressure sensor cell. The metallic pipe member protrudes beyond an end face of the resin case to support load.
摘要:
A physical value detecting apparatus includes a housing having a concave portion; a physical value detecting device housed in the concave portion and having a substantially rectangular shape for converting a physical value into an electric signal and outputting the electric signal; a device for taking out a signal from the physical value detecting device; an adhesive member for adhering the physical value detecting device to the concave portion; and a positioning device provided on an inner wall of the concave portion for positioning the physical value detecting device. The concave portion supports the physical value detecting device at a bottom thereof via the adhesive member without contacting corner parts of the physical value detecting device.
摘要:
An aspect of a pressure sensor package is that a condensed droplet can be prevented from solidifying and blocking the hole of a pressure inlet pipe, without increasing the external dimensions of the package. Aspects of the invention include a groove in a wall surface of a hole of a pressure inlet pipe, a droplet condensed on the wall surface spreads along the groove by a capillary action, and it is possible to prevent the hole of the pressure inlet pipe being blocked by the droplet.