Blood oxygen sensor packaging structure

Abstract

A blood oxygen sensor packaging structure comprises a substrate, a light sensing part and a light emitting part are installed at the two ends of the substrate respectively, light-transmitting layers are arranged outside the light sensing part and the light emitting part, the light-transmitting layers enable the light sensing part and the light emitting part to have a waterproof function, and the light-transmitting layers cannot affect signal emission of the light emitting part and signal receiving of the light sensing part. The light blocking layer is arranged between the two light-transmitting layers, so that signal misjudgment caused by the fact that light signals emitted by the light-emitting part do not enter the light-sensing part without a human body is avoided; besides, the packaging structure realizes integration of a light-emitting function and a light-sensing function, is small in size and low in requirement on installation space, and can meet the assembly requirement of a miniaturized structure of the intelligent wearable equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of blood oxygen monitoring devices, and in particular to a packaging structure of a blood oxygen sensor. Background Art

[0002] As people increasingly prioritize their health, they're paying more and more attention to their physiological parameters in their daily lives. Consequently, smart wearable devices are gaining increasing market favor due to their portability, convenient testing process, and straightforward results. Blood oxygen saturation, a common physiological parameter, is normally between 95% and 100%. Various conditions, such as heart failure, chronic lung disease, and sleep apnea, can reduce blood oxygen saturation. Long-term abnormal blood oxygen saturation levels can be fatal. Smart wearable devices can help detect deterioration in these conditions before they become serious.

[0003] However, traditional products configure the light-emitting function and the light-sensing function as two independent devices, resulting in a large product size and unable to meet the assembly requirements of the miniaturized structure of smart wearable devices. Utility Model Content

[0004] The purpose of the utility model is to provide a blood oxygen sensor packaging structure to meet the assembly requirements of the miniaturized structure of smart wearable devices.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A blood oxygen sensor packaging structure includes a substrate, a light-emitting portion provided at one end of the substrate, and a photosensitive portion provided at the other end of the substrate. The photosensitive portion is used to sense the light signal reflected when the light-emitting portion irradiates hemoglobin. A light-transmitting layer is provided outside the light-emitting portion and the photosensitive portion, and a light-blocking layer is further provided between the light-transmitting layer of the light-emitting portion and the light-transmitting layer of the photosensitive portion.

[0007] Furthermore, the height of the light-blocking layer is not lower than the height of the light-transmitting layer.

[0008] Furthermore, the light-blocking layer is provided around the light-transmitting layer of the light-emitting portion, and the light-blocking layer is provided around the light-transmitting layer of the photosensitive portion.

[0009] Furthermore, the light-transmitting layer is provided with a groove, the groove is located around the light-emitting portion and the light-sensitive portion, and the groove is filled with the light-blocking layer.

[0010] Furthermore, the light emitting part is a red light chip and an infrared chip.

[0011] Furthermore, the photosensitive part is a photosensitive chip.

[0012] Furthermore, the light-transmitting layer is made of transparent epoxy resin, and the light-blocking layer is made of black epoxy resin.

[0013] Furthermore, the substrate is provided with a plurality of pins, and the light emitting portion and the light sensing portion are electrically connected to the corresponding pins.

[0014] The beneficial effects of the utility model are:

[0015] 1. The present invention proposes a blood oxygen sensor packaging structure, comprising a substrate, with a photosensitive portion and a light-emitting portion mounted on either end thereof, each provided with a light-transmitting layer. The light-transmitting layer provides waterproofing for the photosensitive portion and the light-emitting portion, and a light-blocking layer is provided between the two light-transmitting layers to prevent light signals emitted by the light-emitting portion from entering the photosensitive portion without passing through the human body, thereby causing signal misjudgment. Furthermore, the packaging structure integrates the light-emitting and light-sensing functions, is compact, and requires less installation space, thus meeting the assembly requirements of miniaturized structures for smart wearable devices.

[0016] 2. In the packaging structure of a blood oxygen sensor proposed by the present invention, the height of the light-blocking layer is not lower than that of the light-transmitting layer, thereby reducing the possibility that the light signal emitted by the light-emitting part enters the photosensitive part without passing through the human body.

[0017] 3. The present invention proposes a blood oxygen sensor packaging structure in which a light-blocking layer is provided around the light-transmitting layer of the light-emitting part, and a light-blocking layer is provided around the light-transmitting layer of the photosensitive part. This further limits the light signal emitted by the light-emitting part to passing through the human body before entering the photosensitive part, thereby improving the accuracy of monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a cross-sectional view of a blood oxygen sensor packaging structure of the present invention;

[0020] Figure 2 This is a top view of a blood oxygen sensor packaging structure of the present invention;

[0021] In the figure, 10, substrate; 101, pin; 201, red light chip; 202, infrared chip; 30, photosensitive chip; 40, light-transmitting layer; 50, light-blocking layer. DETAILED DESCRIPTION

[0022] The following combination Figure 1-2 The utility model is described in detail.

[0023] A blood oxygen sensor packaging structure includes a substrate 10, with a light-emitting portion disposed at one end and a photosensitive portion disposed at the other end. The photosensitive portion is used to sense the light signal reflected by the light-emitting portion when it irradiates hemoglobin. A light-transmitting layer 40 is disposed outside the light-emitting and photosensitive portions. This layer 40 provides waterproofing for the light-emitting and photosensitive portions, and does not affect the emission of light-emitting signals or the reception of signals by the photosensitive portion. A light-blocking layer 50 is also disposed between the light-transmitting layer 40 of the light-emitting portion and the light-transmitting layer 40 of the photosensitive portion to prevent the light signal emitted by the light-emitting portion from entering the photosensitive portion without passing through the human body and causing signal misjudgment. Furthermore, this packaging structure integrates the light-emitting and photosensitive functions, is compact, and requires less installation space, meeting the assembly requirements of miniaturized smart wearable devices.

[0024] In this embodiment, the height of the light blocking layer 50 is not lower than the height of the light transmitting layer 40. Furthermore, the end face of the light blocking layer 50 is flush with the end face of the light transmitting layer 40, reducing the possibility that the light signal emitted by the light emitting part enters the photosensitive part without passing through the human body.

[0025] In this embodiment, a light-blocking layer 50 is provided around the light-transmitting layer 40 of the light-emitting portion, and a light-blocking layer 50 is provided around the light-transmitting layer 40 of the light-sensing portion. This further restricts the light signal emitted by the light-emitting portion to pass through the human body before entering the light-sensing portion, thereby improving monitoring accuracy. Furthermore, grooves are formed around the light-transmitting layer 40, located around both the light-emitting portion and the light-sensing portion, and are filled with the light-blocking layer 50.

[0026] In this embodiment, the light emitting portion is a red light chip 201 and an infrared chip 202 , and the light sensing portion is a light sensing chip 30 .

[0027] In this embodiment, the light-transmitting layer 40 is made of transparent epoxy resin, and the light-blocking layer 50 is made of black epoxy resin.

[0028] In this embodiment, the substrate 10 is provided with a plurality of pins 101 , and the light emitting portion and the light sensing portion are electrically connected to corresponding pins 101 .

[0029] In this embodiment, the width W of the packaged blood oxygen sensor is 0.75 mm, the length L is 6.3 mm, and the thickness H is 0.78 mm. These dimensions can meet the assembly requirements of most smart wearable devices on the market.

[0030] The packaging process of the blood oxygen sensor packaging structure proposed in this embodiment is as follows:

[0031] S1. Remove the substrate 10 and complete the die bonding wires of the red light chip 201, the infrared chip 202, and the photosensitive chip respectively;

[0032] S2, the transparent epoxy numerical value is used to package and protect the red light chip 201, the infrared chip 202 and the photosensitive chip, and a light transmission layer 40 is formed, that is, the first injection molding;

[0033] S3, a groove is opened in the light transmission layer 40 through a semi-cut operation mode, and the groove is located around the red light chip 201, the infrared chip 202 and the photosensitive chip;

[0034] S4, black light isolation epoxy is filled in the groove to form the light isolation protection of the light transmission layer 40, that is, the second injection molding;

[0035] S5, the packaging is completed.

[0036] The above embodiment is only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A blood oxygen sensor packaging structure, characterized in that: It includes a substrate, one end of which is provided with a light-emitting part, and the other end of which is provided with a photosensitive part, wherein the photosensitive part is used to sense the light signal reflected when the light-emitting part irradiates hemoglobin, and a light-transmitting layer is provided outside the light-emitting part and the photosensitive part, and a light-blocking layer is also provided between the light-transmitting layer of the light-emitting part and the light-transmitting layer of the photosensitive part.

2. The blood oxygen sensor packaging structure according to claim 1, wherein: The height of the light-blocking layer is not lower than that of the light-transmitting layer.

3. The blood oxygen sensor packaging structure according to claim 2, wherein: The light-blocking layer is provided around the light-transmitting layer of the light-emitting portion, and the light-blocking layer is provided around the light-transmitting layer of the light-sensitive portion.

4. The blood oxygen sensor packaging structure according to claim 3, wherein: The light-transmitting layer is provided with a groove, the groove is located around the light-emitting portion and the light-sensing portion, and the groove is filled with the light-blocking layer.

5. The blood oxygen sensor packaging structure according to claim 1, wherein: The light emitting parts are a red light chip and an infrared chip.

6. The blood oxygen sensor packaging structure according to claim 1, wherein: The photosensitive part is a photosensitive chip.

7. The blood oxygen sensor packaging structure according to claim 1, characterized in that: The light-transmitting layer is made of transparent epoxy resin, and the light-blocking layer is made of black epoxy resin.

8. The blood oxygen sensor packaging structure according to claim 1, wherein: The substrate is provided with a plurality of pins, and the light emitting portion and the light sensing portion are electrically connected to the corresponding pins.

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