Integrated sensor modules
First Claim
1. A sensor module, comprising:
- a substrate having a top surface and a bottom surface;
a packaged light source semiconductor device mounted to the top surface of the substrate, the packaged light source semiconductor device includinga light emitter die including one or more light emitting elements encapsulated by a light transmissive molding compound;
a top surface formed by a top surface of the light transmissive molding compound that encapsulates the one or more light emitting elements;
a bottom surface including electrical contacts for the one or more light emitting elements; and
a peripheral surface extending between the top and bottom surfaces;
a packaged light detector semiconductor device mounted to the top surface of the substrate such that there is a gap between the packaged light detector semiconductor device and the packaged light source semiconductor device, the packaged light detector semiconductor device includinga light detector die including one or more light detecting elements encapsulated by a light transmissive molding compound;
a top surface formed by a top surface of the light transmissive molding compound that encapsulates the one or more light detecting elements;
a bottom surface including electrical contacts for the one or more light detecting elements; and
a peripheral surface extending between the top and bottom surfaces; and
a pre-molded cover structure including a portion of which is molded from an opaque molding compound and also includinga first pre-molded cavity covered by a first light transmissive window;
a second pre-molded cavity covered by a second light transmissive window; and
a barrier formed of the opaque molding compound between the first pre-molded cavity and the second pre-molded cavity;
wherein the pre-molded cover structure is attached to the substrate such that the packaged light source semiconductor device is positioned within the first pre-molded cavity, the packaged light detector semiconductor device is positioned within the second pre-molded cavity, the barrier is positioned between the packaged light detector semiconductor device and the packaged light source semiconductor device, the first light transmissive window covers the one or more light emitting elements of the light emitter die, and the second light transmissive window covers the one or more light detecting elements of the light detector die;
wherein the light transmissive molding compound, which encapsulates the one or more light emitting elements of the light emitter die of the packaged light source semiconductor device, has an index of refraction that is substantially the same as an index of refraction of the first light transmissive window, which covers the first pre-molded cavity of the pre-molded cover structure in which the packaged light source semiconductor device is positioned; and
wherein the light transmissive molding compound, which encapsulates the one or more light detecting elements of the light detector die of the packaged light detector semiconductor device, has an index of refraction that is substantially the same as an index of refraction of the second light transmissive window, which covers the second pre-molded cavity of the pre-molded cover structure in which the packaged light detector semiconductor device is positioned.
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Accused Products
Abstract
An integrated sensor module includes one or more packaged light source semiconductor devices and one or more packaged light detector semiconductor devices mounted to a top surface of a substrate. A pre-molded cover structure includes a portion molded from an opaque molding compound and a further portion molded from a light transmissive molding compound. For each of the packaged light source and light detector semiconductor devices, the pre-molded cover structure includes a pre-molded cavity covered by a window formed of the light transmissive molding compound. The pre-molded cover structure is attached to the substrate such that each of the packaged light source and light detector semiconductor devices fits within a respective cavity, and such that a barrier formed of the opaque molding compound is positioned between each packaged light source semiconductor device and light detector semiconductor device. The module can also include additional sensors and/or electrodes for use by sensors.
39 Citations
19 Claims
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1. A sensor module, comprising:
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a substrate having a top surface and a bottom surface; a packaged light source semiconductor device mounted to the top surface of the substrate, the packaged light source semiconductor device including a light emitter die including one or more light emitting elements encapsulated by a light transmissive molding compound; a top surface formed by a top surface of the light transmissive molding compound that encapsulates the one or more light emitting elements; a bottom surface including electrical contacts for the one or more light emitting elements; and a peripheral surface extending between the top and bottom surfaces; a packaged light detector semiconductor device mounted to the top surface of the substrate such that there is a gap between the packaged light detector semiconductor device and the packaged light source semiconductor device, the packaged light detector semiconductor device including a light detector die including one or more light detecting elements encapsulated by a light transmissive molding compound; a top surface formed by a top surface of the light transmissive molding compound that encapsulates the one or more light detecting elements; a bottom surface including electrical contacts for the one or more light detecting elements; and a peripheral surface extending between the top and bottom surfaces; and a pre-molded cover structure including a portion of which is molded from an opaque molding compound and also including a first pre-molded cavity covered by a first light transmissive window; a second pre-molded cavity covered by a second light transmissive window; and a barrier formed of the opaque molding compound between the first pre-molded cavity and the second pre-molded cavity; wherein the pre-molded cover structure is attached to the substrate such that the packaged light source semiconductor device is positioned within the first pre-molded cavity, the packaged light detector semiconductor device is positioned within the second pre-molded cavity, the barrier is positioned between the packaged light detector semiconductor device and the packaged light source semiconductor device, the first light transmissive window covers the one or more light emitting elements of the light emitter die, and the second light transmissive window covers the one or more light detecting elements of the light detector die; wherein the light transmissive molding compound, which encapsulates the one or more light emitting elements of the light emitter die of the packaged light source semiconductor device, has an index of refraction that is substantially the same as an index of refraction of the first light transmissive window, which covers the first pre-molded cavity of the pre-molded cover structure in which the packaged light source semiconductor device is positioned; and wherein the light transmissive molding compound, which encapsulates the one or more light detecting elements of the light detector die of the packaged light detector semiconductor device, has an index of refraction that is substantially the same as an index of refraction of the second light transmissive window, which covers the second pre-molded cavity of the pre-molded cover structure in which the packaged light detector semiconductor device is positioned. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A user-wearable device, comprising:
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a housing having a front side and a back side; a band that straps the housing to a person'"'"'s wrist; a digital display on the front side of the housing; and a sensor module on the back side of the housing; wherein the sensor module comprises a substrate having a top surface and a bottom surface; a packaged light source semiconductor device mounted to the top surface of the substrate, the packaged light source semiconductor device including a light emitter die including one or more light emitting elements encapsulated by a light transmissive molding compound; a top surface formed by a top surface of the light transmissive molding compound that encapsulates the one or more light emitting elements; a bottom surface including electrical contacts for the one or more light emitting elements; and a peripheral surface extending between the top and bottom surfaces; a packaged light detector semiconductor device mounted to the top surface of the substrate such that there is a gap between the packaged light detector semiconductor device and the packaged light source semiconductor device, the packaged light detector semiconductor device including a light detector die including one or more light detecting elements encapsulated by a light transmissive molding compound; a top surface formed by a top surface of the light transmissive molding compound that encapsulates the one or more light detecting elements; a bottom surface including electrical contacts for the one or more light detecting elements; and a peripheral surface extending between the top and bottom surfaces; a pre-molded cover structure including a portion of which is molded from an opaque molding compound and also including a first pre-molded cavity covered by a first light transmissive window; a second pre-molded cavity covered by a second light transmissive window; and a barrier formed of the opaque molding compound between the first pre-molded cavity and the second pre-molded cavity; wherein the pre-molded cover structure is attached to the substrate such that the packaged light source semiconductor device is positioned within the first pre-molded cavity, the packaged light detector semiconductor device is positioned within the second pre-molded cavity, the barrier is positioned between the packaged light detector semiconductor device and the packaged light source semiconductor device, the first light transmissive window covers the one or more light emitting elements of the light emitter die, and the second light transmissive window covers the one or more light detecting elements of the light detector die; wherein the light transmissive molding compound, which encapsulates the one or more light emitting elements of the light emitter die of the packaged light source semiconductor device, has an index of refraction that is substantially the same as an index of refraction of the first light transmissive window, which covers the first pre-molded cavity of the pre-molded cover structure in which the packaged light source semiconductor device is positioned; and wherein the light transmissive molding compound, which encapsulates the one or more light detecting elements of the light detector die of the packaged light detector semiconductor device, has an index of refraction that is substantially the same as an index of refraction of the second light transmissive window, which covers the second pre-molded cavity of the pre-molded cover structure in which the packaged light detector semiconductor device is positioned. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification