Acceleration sensor manufactureable by simplified method
AssigneeOki Semiconductor Co., Ltd.
InventorNaokatsu Ikegami
Life of this patent
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Abstract
An acceleration sensor has a mass movably linked to a peripheral attachment section to which at least one stopper is attached to stop the motion of the mass in a certain direction. In the absence of acceleration, the mass rests at a distance from a first surface of the stopper. A quantity of a curable elastic adhesive on a second surface of the stopper absorbs impact of the mass on the first surface, enabling the acceleration sensor to survive mechanical shock. The curable elastic adhesive may adhere to the cover of a package in which the acceleration sensor is enclosed. The curable elastic adhesive may be applied as a drop or swath from a dispenser, which simplifies the manufacturing process and reduces the manufacturing cost.
Claims16
An acceleration sensor having a mass movably linked to a peripheral attachment section, the mass moving, in response to acceleration, in at least a first direction relative to the peripheral attachment section, comprising:
- at least one stopper fixedly attached to the peripheral attachment section for stopping motion of the mass in the first direction, the stopper having a first major surface and a second major surface, the first major surface being disposed between the second major surface and the mass and, absent said acceleration, being spaced from the mass in the first direction;
- and
- a quantity of a curable elastic adhesive disposed on the second major surface of the stopper for absorbing impact of the mass on the first major surface of the stopper.
Dependencies are inferred from the claim text.