Method of making an acceleration sensor
First Claim
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1. A method of assembling an acceleration sensor, comprising:
- a) forming an elongate flexible substrate;
b) mounting an acceleration detection means on said flexible substrate so as to be active to detect acceleration applied to said sensor;
c) mounting signal processing means on said flexible substrate in connection with said acceration detection means so as to receive an output thereof;
d) mounting connecting terminals to said flexible substrate in connection with said signal processing means;
e) adhering opposing portions of said flexible substrate to respective plates, one of said plates having an opening defined therethrough, a portion of said flexible substrate mounting said acceleration detection means being positioned over said opening;
f) folding said flexible substrate along a central folding portion;
g) inserting said plates and said folded flexible substrate into a casing having an open portion such that one plate is inserted topmost and said acceleration detecting means mounted on flexible substrate is facing in an acceleration direction, the shape of the plates conforming to the circumferential shape of the casing and the other plate being inset at the bottom of the open portion of the casing;
h) installing connecting means connecting said acceleration detecting means with an output external to said casing; and
i) sealing said casing via a sealing agent.
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Abstract
A semiconductor type acceleration sensor comprises a flexible printed circuit board on which a semiconductor type detector chip section is mounted. The detector chip is formed with openings therethrough overlapping an opening formed in a rear-side base plate of the flexible printed circuit board such that the detector chip section is supported only by a bridge portion. In case of excess input in an acceleration direction, elastic deformation of the bridge portion and a bending portion of the flexible printed circuit board provide absorption of the excess input for protecting the detector chip section.
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Citations
9 Claims
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1. A method of assembling an acceleration sensor, comprising:
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a) forming an elongate flexible substrate; b) mounting an acceleration detection means on said flexible substrate so as to be active to detect acceleration applied to said sensor; c) mounting signal processing means on said flexible substrate in connection with said acceration detection means so as to receive an output thereof; d) mounting connecting terminals to said flexible substrate in connection with said signal processing means; e) adhering opposing portions of said flexible substrate to respective plates, one of said plates having an opening defined therethrough, a portion of said flexible substrate mounting said acceleration detection means being positioned over said opening; f) folding said flexible substrate along a central folding portion; g) inserting said plates and said folded flexible substrate into a casing having an open portion such that one plate is inserted topmost and said acceleration detecting means mounted on flexible substrate is facing in an acceleration direction, the shape of the plates conforming to the circumferential shape of the casing and the other plate being inset at the bottom of the open portion of the casing; h) installing connecting means connecting said acceleration detecting means with an output external to said casing; and i) sealing said casing via a sealing agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification