KR20120087779A - Method for manufacturing proximity sensor - Google Patents

Method for manufacturing proximity sensor Download PDF

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Publication number
KR20120087779A
KR20120087779A KR1020110119340A KR20110119340A KR20120087779A KR 20120087779 A KR20120087779 A KR 20120087779A KR 1020110119340 A KR1020110119340 A KR 1020110119340A KR 20110119340 A KR20110119340 A KR 20110119340A KR 20120087779 A KR20120087779 A KR 20120087779A
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KR
South Korea
Prior art keywords
light
circuit board
printed circuit
encapsulation
proximity sensor
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KR1020110119340A
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Korean (ko)
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문진식
소병훈
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주식회사 오디텍
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Priority to KR1020110119340A priority Critical patent/KR20120087779A/en
Publication of KR20120087779A publication Critical patent/KR20120087779A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00Photometry, e.g. photographic exposure meter
    • G01J1/02Details
    • G01J1/0266Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00Photometry, e.g. photographic exposure meter
    • G01J1/02Details
    • G01J1/0238Details making use of sensor-related data, e.g. for identification of sensor or optical parts
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00Photometry, e.g. photographic exposure meter
    • G01J1/02Details
    • G01J1/04Optical or mechanical part supplementary adjustable parts
    • G01J1/0407Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0455Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings having a throughhole enabling the optical element to fulfil an additional optical function, e.g. a mirror or grating having a through-hole for a light collecting or light injecting optical fibre
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/12Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
    • H01L31/125Composite devices with photosensitive elements and electroluminescent elements within one single body

Abstract

PURPOSE: A method for manufacturing a proximity sensor is provided to prevent infrared rays of an infrared emitting diode flowing into the inside of a proximity sensor, thereby improving the malfunction of the proximity sensor. CONSTITUTION: A method for manufacturing a proximity sensor is as follows. An infrared emitting diode(20) and a light emitting diode(30) are respectively welded in a side and the other side of a top surface of a PCB(Printed Circuit Board)(10). A transmission sealing part(40) is formed in the PCB. The transmission sealing part accommodates the infrared emitting diode and the light emitting diode and a lens unit in one side and the other lens unit in the other side are formed in one side and the other side of the upper part of the transmission sealing part. A horizontal groove(50) being spread from the transmission sealing part to a predetermined length of the PCB by using a cutting tool for partitioning a surface of the PCB into one side and the other side. A bonding layer is formed on the transmission sealing part. A light-shielding sealing material is filled with the horizontal groove and covers a portion except the lens units of one and the other sides of the transmission sealing part so that a light-shielding sealing part(60) is formed.

Description

근접센서의 제조방법{Method for manufacturing proximity sensor}Method for manufacturing proximity sensor

본 발명은 적외선발광소자의 적외선이 내부로 누설되는 것을 방지하여 오작동되는 것을 대폭 개선할 수 있는 근접센서의 제조하기 위한 근접센서의 제조방법에 관한 것이다.The present invention relates to a method of manufacturing a proximity sensor for manufacturing a proximity sensor that can significantly improve the malfunction of the infrared light emitting device to prevent leakage of the inside.

일반적으로 근접센서는 비교적 근거리에 있는 물체의 유무를 검지하거나, 휴대전화기 등이 사용자의 얼굴에 근접하고 있는지 여부를 검출하기 위하여 주로 사용된다.In general, the proximity sensor is mainly used to detect the presence of an object in a relatively short distance, or to detect whether or not the mobile phone is close to the user's face.

한편 휴대 전화기는 디스플레이, 카메라, 음향 등의 면에서 많은 개선이 이루어지고 있다. 또한 화상통화기능, 스피커폰 기능 등이 대부분의 휴대 전화기에 탑재되어 있다. 사용자가 휴대 전화기를 사용자의 귀에 가까이 데고 전화 통화를 하는 경우 터치 디스플레이와 얼굴의 접촉에 의해 오작동이 되는 것을 방지해야 하고, 스피커폰 기능, 화상통화기능을 하는 경우에는 터치 디스플레이기능을 활성화시켜야 할 필요성이 있다. 이러한 필요에 의해 최신 휴대 전화기에는 근접센서가 장착되는 것이 일반적이다.On the other hand, many improvements are being made in terms of display, camera, sound, and the like. In addition, video calling, speakerphone, and the like are installed in most mobile phones. When a user places a mobile phone near the user's ear and makes a phone call, it is necessary to prevent malfunction due to the touch of the touch display and the face, and when the speakerphone function and the video call function are performed, it is necessary to activate the touch display function. have. Due to this need, modern mobile phones are generally equipped with proximity sensors.

근접센서는 휴대전화기 등의 내부에 설치되고, 인쇄회로기판에 적외선발광소자, 수광소자가 접합된 상태에서 몰드수지에 의해 보호되는 구조로 구성된다. 상기 적외선발광소자로부터 조사된 적외선은 얼굴 등의 근접한 물체에 반사되고, 반사된 적외선은 상기 수광소자에 입사됨에 따라 근접한 물체가 검출된다.The proximity sensor is installed inside a mobile phone or the like, and has a structure protected by a mold resin in a state in which an infrared light emitting element and a light receiving element are bonded to a printed circuit board. The infrared rays irradiated from the infrared light emitting element are reflected to a near object such as a face, and the reflected infrared rays are detected as the near object is incident on the light receiving element.

상기 적외선발광소자로부터 조사되는 대부분의 적외선은 몰드수지를 통과하여 외부로 출사되나, 일부 적외선은 몰드수지를 거쳐 직접 수광소자로 입사되거나, 인쇄회로기판의 표면을 따라 직접 수광소자로 입사되어 근접센서가 오작동되는 문제가 있다.Most of the infrared rays irradiated from the infrared light emitting element are emitted to the outside through the mold resin, but some infrared rays are incident directly to the light receiving element through the mold resin, or directly into the light receiving element along the surface of the printed circuit board to approach the proximity sensor. There is a problem of malfunction.

이와 같은 종래의 문제점을 해결하기 위한 본 발명은 적외선발광소자의 적외선이 내부로 누설되는 것을 방지하여 근접센서의 오작동을 대폭 개선할 수 있고 구조가 간단하여 제조비용을 크게 절감할 수 있는 근접센서의 제조방법을 제공함에 그 목적이 있다.The present invention for solving such a conventional problem is to prevent the infrared radiation of the infrared light emitting device to leak inside can greatly improve the malfunction of the proximity sensor, and the structure is simple to greatly reduce the manufacturing cost of the proximity sensor The purpose is to provide a manufacturing method.

상기와 같은 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

a) 인쇄회로기판의 상부면 일측 및 타측에 각각 적외선발광소자 및 수광소자를 접합하는 단계와;a) bonding an infrared light emitting element and a light receiving element to one side and the other side of the upper surface of the printed circuit board, respectively;

b) 상기 적외선발광소자 및 수광소자를 수용한 상태로 형성되고, 상부의 일측 및 타측에 일측 렌즈부 및 타측 렌즈부가 형성되도록 상기 인쇄회로기판 상에 투광봉지부를 형성하는 단계와;b) forming a light-transmitting encapsulation portion on the printed circuit board formed in a state of receiving the infrared light emitting element and the light receiving element, so that one lens portion and the other lens portion are formed on one side and the other side of the upper portion;

c) 상기 인쇄회로기판의 표면을 일측과 타측으로 구획하기 위하여, 절삭공구를 이용하여 상기 투광봉지부에서 상기 인쇄회로기판의 일정깊이에 이르는 가로홈을 형성하는 단계와;c) forming a horizontal groove reaching the predetermined depth of the printed circuit board in the transparent encapsulation part by using a cutting tool to partition the surface of the printed circuit board into one side and the other side;

d) 상기 투광봉지부 상에 접착층을 형성하는 단계와;d) forming an adhesive layer on the transparent bag;

e) 상기 가로홈에 충진하고, 상기 투광봉지부의 일측 렌즈부 및 타측 렌즈부를 제외한 부분을 감싸도록 차광봉지제로 성형하여 상기 차광봉지부를 형성하는 단계;를 포함하여 이루어지는 것을 특징으로 하는 근접센서의 제조방법을 제공한다.e) filling the horizontal groove, and forming the light shielding encapsulation by forming a light shielding encapsulant so as to surround a portion except the one lens unit and the other lens unit of the light-transmitting encapsulation unit, and manufacturing the proximity sensor. Provide a method.

그리고 상기 c)단계에서 상기 인쇄회로기판에 형성된 상기 가로홈의 깊이는 상기 인쇄회로기판 두께의 1/3~1/2인 것이 바람직하다.And the depth of the horizontal groove formed in the printed circuit board in step c) is preferably 1/3 to 1/2 of the thickness of the printed circuit board.

또한 상기 c)단계에서 폭이 0.15~0.3mm인 상기 가로홈을 형성하는 것이 좋다.In addition, it is preferable to form the horizontal groove having a width of 0.15 ~ 0.3mm in step c).

그리고 상기 e)단계는 상기 차광봉지부의 상부에 상기 투광봉지부의 일측 렌즈부 및 타측 렌즈부의 주변에 상기 일측 렌즈부 및 타측 렌즈부의 높이보다 높게 돌출형성된 돌출부가 일체로 구비되도록 형성하는 것이 좋다.The step e) may be formed so that the protrusions protruding higher than the height of the one lens portion and the other lens portion are integrally formed around the one side lens portion and the other lens portion of the light-transmissive sealing portion.

본 발명의 근접센서의 제조방법은 적외선발광소자의 적외선이 내부로 누설되는 것을 방지하여 근접센서의 오작동을 대폭 개선할 수 있고 구조가 간단하여 제조비용을 크게 절감할 수 있는 효과가 있다.The manufacturing method of the proximity sensor of the present invention can prevent the infrared rays of the infrared light emitting device from leaking to the inside, thereby greatly improving the malfunction of the proximity sensor, and having a simple structure, greatly reducing the manufacturing cost.

도 1은 인쇄회로기판 상에 적외선발광소자 및 수광소자가 접합된 상태를 나타내는 종단면도이고,
도 2는 인쇄회로기판 상에 적외선발광소자 및 수광소자가 접한된 상태를 나타내는 평면도이다.
도 3은 인쇄회로기판 상에 투광봉지부가 형성된 상태를 나타내는 종단면도이다.
도 4는 투광봉지부 및 인쇄회로기판 상에 가로홈이 형성된 상태를 나타내는 단면도이다.
도 5는 차광봉지부가 형성된 상태를 나타내는 단면도이다.
도 6은 투광봉지부 상에 접착층을 형성한 후 차광봉지부를 형성한 상태를 나타내는 도면이다.
도 7은 본 발명에 의해 제조된 근접센서를 나타내는 사시도이다.
1 is a longitudinal sectional view showing a state in which an infrared light emitting device and a light receiving device are bonded to a printed circuit board,
2 is a plan view illustrating a state in which an infrared light emitting element and a light receiving element are in contact with a printed circuit board.
3 is a longitudinal sectional view showing a state in which a light-transmitting encapsulation part is formed on a printed circuit board.
4 is a cross-sectional view illustrating a state in which horizontal grooves are formed on a light emitting encapsulation portion and a printed circuit board.
5 is a cross-sectional view illustrating a state in which a light shielding encapsulation part is formed.
6 is a view illustrating a state in which a light blocking encapsulation part is formed after an adhesive layer is formed on a light transmitting encapsulation part.
7 is a perspective view showing a proximity sensor manufactured by the present invention.

이하 본 발명의 근접센서의 제조방법에 대해 실시예를 들어 상세히 설명하면 다음과 같고, 본 발명의 권리범위는 하기의 실시예에 한정되는 것은 아니다.
Hereinafter, a method for manufacturing the proximity sensor of the present invention will be described in detail with reference to Examples. The scope of the present invention is not limited to the following Examples.

본 발명의 근접센서의 제조방법은 적외선발광소자 및 수광소자 접합단계, 투광봉지부 형성단계, 가로홈 형성단계, 차광봉지부 형성단계를 포함하여 이루어진다.
The method of manufacturing a proximity sensor of the present invention includes an infrared light emitting device and a light receiving device bonding step, a light emitting encapsulation step, a horizontal groove forming step, a light shielding encapsulation step forming step.

도 1은 인쇄회로기판 상에 적외선발광소자 및 수광소자가 접합된 상태를 나타내는 종단면도이고, 도 2는 인쇄회로기판 상에 적외선발광소자 및 수광소자가 접한된 상태를 나타내는 평면도이다.1 is a longitudinal cross-sectional view illustrating a state in which an infrared light emitting element and a light receiving element are bonded to a printed circuit board, and FIG. 2 is a plan view illustrating a state in which an infrared light emitting element and a light receiving element are in contact with a printed circuit board.

먼저 상기 적외선발광소자 및 수광소자 접합단계는 도 1과 같이 인쇄회로기판(10)의 상부면 일측에 적외선발광소자(20)를 접합하고, 상부면 타측에 수광소자(30)를 접합하는 단계이다.First, the step of bonding the infrared light emitting element and the light receiving element is a step of bonding the infrared light emitting element 20 to one side of the upper surface of the printed circuit board 10 and bonding the light receiving element 30 to the other side of the upper surface as shown in FIG. 1. .

상기 인쇄회로기판(10)의 상부면 일측에는 적외선발광소자(20)를 와이어 본딩 접합하기 위한 본딩패드(122)가 형성되고, 타측에는 수광소자(30)를 와이어 본딩 접합하기 위한 본딩패드(124)가 형성된다. 상기 적외선발광소자(20) 및 상기 수광소자(30)는 상기 본딩패드(122, 124)에 각각 와이어 본딩된다.A bonding pad 122 is formed on one side of the upper surface of the printed circuit board 10 to wire bond the infrared light emitting device 20, and a bonding pad 124 is used to wire bond the light receiving device 30 to the other side. ) Is formed. The infrared light emitting device 20 and the light receiving device 30 are wire bonded to the bonding pads 122 and 124, respectively.

그리고 인쇄회로기판(10)의 저면에는 회로패턴(미도시)이 형성된다. 그리고 상기 납땜패드(122, 124)와 상기 인쇄회로기판(10)의 회로패턴은 스루홀(132, 134)에 의해 전기적으로 연결된다.A circuit pattern (not shown) is formed on the bottom surface of the printed circuit board 10. The solder pads 122 and 124 and the circuit patterns of the printed circuit board 10 are electrically connected by the through holes 132 and 134.

상기 인쇄회로기판(10)의 저면에 회로패턴이 형성되는 이유는 후술되는 상기 가로홈 형성단계에 의해 상기 인쇄회로기판(10)의 상부면에 일측과 타측으로 구획하는 가로홈이 형성되기 때문이다.
The reason why the circuit pattern is formed on the bottom surface of the printed circuit board 10 is that horizontal grooves are formed on the upper surface of the printed circuit board 10 to be divided into one side and the other side by the horizontal groove forming step to be described later. .

도 3은 인쇄회로기판 상에 투광봉지부가 형성된 상태를 나타내는 종단면도이다.3 is a longitudinal sectional view showing a state in which a light-transmitting encapsulation part is formed on a printed circuit board.

상기 투광봉지부 형성단계는 도 3과 같이 상기 적외선발광소자(20) 및 수광소자(30)를 수용한 상태로 상기 인쇄회로기판(10) 상에 투광봉지부(40)를 형성하는 단계이다.In the forming of the light emitting encapsulation unit, as shown in FIG. 3, the light emitting encapsulation unit 40 is formed on the printed circuit board 10 in a state where the infrared light emitting device 20 and the light receiving device 30 are accommodated.

상기 투광봉지부(40)는 적외선을 투과할 수 있는 에폭시 수지 등으로 이루어진다. 그리고 상기 투광봉지부(40)의 성형방법은 에폭시 수지 등의 성형수지를 몰드로 사출하여 사출성형하는 등의 방법에 의해 형성된다.The light-sealing encapsulation portion 40 is made of an epoxy resin or the like capable of transmitting infrared rays. And the molding method of the light-transmissive sealing portion 40 is formed by a method such as injection molding by injection molding molding resin such as epoxy resin.

상기 투광봉지부(40)의 상부면 일측 및 타측에 각각 일측 렌즈부(420) 및 타측 렌즈부(430)를 형성하는 것이 좋다. 상기 일측 렌즈부(420)가 구비됨으로서 상기 적외선발광소자(20)로부터 조사된 적외선의 출사각을 넓게 확장할 수 있다. 상기 타측 렌즈부(430)가 구비됨으로써, 상기 적외선발광소자(20)로부터 조사되어 근접한 물체에 반사된 적외선을 상기 타측 렌즈부(430)가 집광하여 상기 수광소자(30)에 수광되는 등 적외선 검출효율을 향상시킬 수 있다.
It is preferable to form one lens unit 420 and the other lens unit 430 on one side and the other side of the top surface of the light-transmitting encapsulation unit 40, respectively. Since the one side lens unit 420 is provided, the emission angle of the infrared light emitted from the infrared light emitting device 20 can be widened. When the other lens unit 430 is provided, the other lens unit 430 collects the infrared light emitted from the infrared light emitting device 20 and reflected on an adjacent object to receive the light received by the light receiving device 30. The efficiency can be improved.

도 4는 투광봉지부 및 인쇄회로기판 상에 가로홈이 형성된 상태를 나타내는 단면도이다.4 is a cross-sectional view illustrating a state in which horizontal grooves are formed on a light emitting encapsulation portion and a printed circuit board.

상기 가로홈 형성단계는 상기 인쇄회로기판(10)의 표면을 일측과 타측으로 구획하기 위하여, 상기 투광봉지부(40)에서 상기 인쇄회로기판(10)의 일정깊이에 이르는 가로홈(50)을 형성하는 단계이다.In the horizontal groove forming step, in order to partition the surface of the printed circuit board 10 into one side and the other side, the horizontal groove 50 reaching the predetermined depth of the printed circuit board 10 in the light-transmitting encapsulation portion 40. Forming.

상기 투광봉지부(40) 및 상기 인쇄회로기판(10)에 형성된 가로홈(50)은 반도체 절단용 장비 등의 절삭공구를 이용하여 형성하는 것이 좋다.The horizontal groove 50 formed in the transparent encapsulation portion 40 and the printed circuit board 10 may be formed using a cutting tool such as a device for cutting a semiconductor.

상기 인쇄회로기판(10) 상에 투광봉지부(40)를 형성한 후 절삭공구를 이용하여 상기 투광봉지부(40) 및 상기 인쇄회로기판(10)에 가로홈(50)을 형성함으로서, 상기 인쇄회로기판(10) 및 상기 투광봉지부(40)에 각각 절삭공구를 이용하여 절삭하지 않고 1회의 절삭공정에 의해 상기 가로홈(50)을 형성할 수 있다. 이에 따라 제조공정을 간소화할 수 있어 제조시간의 단축 및 제조비용의 절감효과를 얻을 수 있다.
By forming the translucent encapsulation portion 40 on the printed circuit board 10 and then forming a horizontal groove 50 in the translucent encapsulation portion 40 and the printed circuit board 10 by using a cutting tool, The horizontal groove 50 may be formed in the printed circuit board 10 and the light-transmitting encapsulation portion 40 by one cutting process without cutting each using a cutting tool. As a result, the manufacturing process can be simplified, thereby reducing the manufacturing time and reducing the manufacturing cost.

상기 투광봉지부(40)를 통과하여 상기 인쇄회로기판(10)에 형성되는 상기 가로홈(50)의 깊이, 즉 상기 인쇄회로기판(10)의 상부면에 형성되는 홈의 깊이(d)는 상기 인쇄회로기판 두께(t)의 1/3~1/2인 것이 바람직하다. 상기 인쇄회로기판(10)에 형성된 홈의 깊이(d)가 인쇄회로기판 두께(t)의 1/3 미만인 경우에는 적외선의 누설을 효과적으로 방지하지 못할 우려가 있고, 1/2 초과인 경우에는 적외선의 누설을 효과적으로 방지할 수 있으나, 인쇄회로기판(10)의 내구성 저하로 제품불량이 빈번하게 발생할 우려가 있다.The depth d of the horizontal groove 50 formed in the printed circuit board 10 through the light-permeable sealing part 40, that is, the depth d of the groove formed in the upper surface of the printed circuit board 10 is Preferably, the thickness of the printed circuit board is 1/3 to 1/2 of the thickness t. If the depth d of the groove formed in the printed circuit board 10 is less than 1/3 of the thickness t of the printed circuit board, there is a possibility that the leakage of infrared rays may not be effectively prevented. Although it can effectively prevent the leakage of the printed circuit board 10 there is a fear that the product defects frequently occur due to the degradation of the durability.

그리고 상기 가로홈의 폭(w)은 0.15~0.3mm인 것이 바람직하다. 그리고 상기 가로홈(50)의 폭(w)이 0.15mm 미만인 경우에는 적외선의 누설을 효과적으로 방지하지 못할 우려가 있고, 0.3mm 초과인 경우에는 가로홈(50)에 의해 근접센서의 크기가 불필요하게 커져 소형화의 어려움이 있는 문제가 있다.
And the width (w) of the horizontal groove is preferably 0.15 ~ 0.3mm. When the width w of the horizontal groove 50 is less than 0.15 mm, there is a possibility that the leakage of infrared rays may not be effectively prevented. When the width w of the horizontal groove 50 is larger than 0.3 mm, the size of the proximity sensor is unnecessary by the horizontal groove 50. There is a problem that there is a difficulty in miniaturization.

도 5는 차광봉지부가 형성된 상태를 나타내는 단면도이다.
5 is a cross-sectional view illustrating a state in which a light shielding encapsulation part is formed.

*상기 차광봉지부 형성단계는 도 5와 같이 적어도 상기 가로홈(50)에 차광봉지제를 충진하여 차광봉지부(60)를 형성하는 단계이다.* The shading encapsulation forming step is a step of forming the shading encapsulation part 60 by filling the shading encapsulant in at least the horizontal groove 50 as shown in FIG. 5.

상기 가로홈(50)에 차광봉지부(60)가 형성됨으로써, 상기 적외선발광소자(20)로부터 조사된 적외선이 상기 인쇄회로기판(10)의 상부면 및 상기 투광봉지부(40)를 통해 직접적으로 상기 수광소자(30)에 수광되는 것을 방지할 수 있어, 근접한 물체에 반사한 적외선만이 상기 수광소자(30)에 수광된다.Since the light blocking encapsulation part 60 is formed in the horizontal groove 50, the infrared rays irradiated from the infrared light emitting element 20 are directly transmitted through the upper surface of the printed circuit board 10 and the light transmitting encapsulation part 40. Therefore, it is possible to prevent the light receiving element 30 from being received, so that only infrared rays reflected by a nearby object are received by the light receiving element 30.

상기 차광봉지제는 적외선을 차단하는 재질로 이루어진다. 그리고 상기 차광봉지부(60)는 성형수지를 몰드로 사출하여 사출성형하는 등의 방법에 의해 형성된다.
The light-shielding encapsulant is made of a material that blocks infrared rays. The light shielding encapsulation part 60 is formed by injection molding of a molding resin into a mold.

특히, 상기 투광봉지부(40)의 일측 렌즈부(420) 및 타측 렌즈부(430)를 제외한 부분을 차광봉지제로 감싼 상태로 성형하여 상기 차광봉지부(60)를 형성하는 것이 좋다. 상기 적외선발광소자(20)에 의해 조사된 적외선이 상기 투광봉지부(40)의 측부로 누설되는 것을 방지하고 상기 일측 렌즈부(420)를 통해서만 출사되고, 또한 상기 타측 렌즈부(430)로 입사한 적외선에 한해 상기 수광소자(30)에 수광됨에 따라 근접센서의 오작동을 방지할 수 있다.Particularly, the light shielding encapsulation part 60 may be formed by molding a portion of the light-sealing encapsulation part 40 except for one side lens part 420 and the other lens part 430 in a state where the light shielding encapsulation agent is wrapped. The infrared light emitted by the infrared light emitting device 20 is prevented from leaking to the side of the light emitting encapsulation part 40 and is emitted only through the one lens part 420, and is incident to the other lens part 430. As only one infrared ray is received by the light receiving element 30, a malfunction of the proximity sensor may be prevented.

나아가 상기 차광봉지부(60)의 상부에 상기 투광봉지부(40)의 일측 렌즈부(420) 및 타측 렌즈부(430)의 주변에 상기 일측 렌즈부(420) 및 타측 렌즈부(430)의 높이보다 높게 돌출형성된 돌출부(650)가 일체로 구비되도록 형성하는 것이 좋다. 상기 돌출부(650)에 의해 상기 차광봉지부(60)에 상기 투광봉지부(40)의 일측 렌즈부(420) 및 타측 렌즈부(430)를 수용하는 수용홈(670)이 형성된다. 상기 차광봉지부(60)의 돌출부(650)에 의해 상기 적외선발광소자(20)의 조사각 및 상기 수광소자(30)의 입사각을 좁게 조절할 수 있어, 근접한 물체를 효과적으로 검출할 수 있다.
Furthermore, the one side of the lens unit 420 and the other side of the lens unit 420 of the light-transmitting encapsulation part 40 and the other side of the lens unit 430 of the light-shielding encapsulation part 60 Protruding portion 650 protruding higher than the height is preferably formed to be integrally provided. An accommodation groove 670 is formed in the light blocking encapsulation part 60 by the protrusion 650 to accommodate the one lens part 420 and the other lens part 430 of the light transmitting encapsulation part 40. The irradiation angle of the infrared light emitting device 20 and the incident angle of the light receiving device 30 are narrowly adjusted by the protrusion 650 of the light blocking encapsulation 60, so that an adjacent object can be effectively detected.

도 6은 투광봉지부 상에 접착층을 형성한 후 차광봉지부를 형성한 상태를 나타내는 도면이다.6 is a view illustrating a state in which a light blocking encapsulation part is formed after an adhesive layer is formed on a light transmitting encapsulation part.

상기 투광봉지부(40) 상에 접착층(70)을 형성하는 접착층 형성단계가 더 구비되는 것이 좋다. 상기 투광봉지부(40)와 상기 차광봉지부(60) 사이에 접착층(70)이 형성됨에 따라, 상기 차광봉지부(60)가 상기 투광봉지부(40)로부터 분리되는 것을 방지할 수 있다.
An adhesive layer forming step of forming an adhesive layer 70 on the light-transmitting encapsulation portion 40 may be further provided. As the adhesive layer 70 is formed between the light-sealing encapsulation portion 40 and the light-shielding encapsulation portion 60, the light-shielding encapsulation portion 60 may be prevented from being separated from the light-sealing encapsulation portion 40.

도 7은 본 발명에 의해 제조된 근접센서를 나타내는 사시도이다.7 is a perspective view showing a proximity sensor manufactured by the present invention.

도 7과 같이 상기 인쇄회로기판(10)의 상부면에 가로홈(50)이 형성되고, 차광봉지제가 상기 가로홈(50)에 충진되어 상기 차광봉지부(60)가 형성됨에 따라 상기 적외선발광소자(20)의 적외선이 내부로 누설되는 것을 방지하여 근접센서의 오작동을 대폭 개선할 수 있는 효과를 기대할 수 있다.As shown in FIG. 7, a horizontal groove 50 is formed on an upper surface of the printed circuit board 10, and a light shielding encapsulant is filled in the horizontal groove 50 so that the light shielding encapsulation part 60 is formed. By preventing the infrared rays of the device 20 from leaking inside, an effect of greatly improving the malfunction of the proximity sensor can be expected.

10: 인쇄회로기판, 20: 적외선발광소자,
30: 수광소자, 40: 투광봉지부,
420: 일측 렌즈부, 430: 타측렌즈부,
50: 가로홈, 60: 차광봉지부,
650: 돌출부, 70: 접착층
10: printed circuit board, 20: infrared light emitting element,
30: light receiving element, 40: floodlight encapsulation,
420: one side lens unit, 430: the other side lens unit,
50: horizontal groove, 60: shading encapsulation,
650: protrusion, 70: adhesive layer

Claims (3)

a) 인쇄회로기판의 상부면 일측 및 타측에 각각 적외선발광소자 및 수광소자를 접합하는 단계와;
b) 상기 적외선발광소자 및 수광소자를 수용한 상태로 형성되고, 상부의 일측 및 타측에 일측 렌즈부 및 타측 렌즈부가 형성되도록 상기 인쇄회로기판 상에 투광봉지부를 형성하는 단계와;
c) 상기 인쇄회로기판의 표면을 일측과 타측으로 구획하기 위하여, 절삭공구를 이용하여 상기 투광봉지부에서 상기 인쇄회로기판의 일정깊이에 이르는 가로홈을 형성하는 단계와;
d) 상기 투광봉지부 상에 접착층을 형성하는 단계와;
e) 상기 가로홈에 충진하고, 상기 투광봉지부의 일측 렌즈부 및 타측 렌즈부를 제외한 부분을 감싸도록 차광봉지제로 성형하여 차광봉지부를 형성하는 단계;를 포함하여 이루어지는 것을 특징으로 하는 근접센서의 제조방법.
a) bonding an infrared light emitting element and a light receiving element to one side and the other side of the upper surface of the printed circuit board, respectively;
b) forming a light-transmitting encapsulation portion on the printed circuit board formed in a state of receiving the infrared light emitting element and the light receiving element, so that one lens portion and the other lens portion are formed on one side and the other side of the upper portion;
c) forming a horizontal groove reaching the predetermined depth of the printed circuit board in the transparent encapsulation part by using a cutting tool to partition the surface of the printed circuit board into one side and the other side;
d) forming an adhesive layer on the transparent bag;
e) filling the horizontal groove, and forming a light shielding encapsulation by forming a light shielding encapsulant so as to surround a portion except the one lens unit and the other lens unit of the light-transmitting encapsulation unit; and forming a light shielding encapsulation unit. .
제1항에 있어서,
상기 c)단계는 깊이가 상기 인쇄회로기판 두께의 1/3~1/2이고, 폭이 0.15~0.3mm인 상기 가로홈을 상기 인쇄회로기판에 형성하는 것을 특징으로 하는 근접센서의 제조방법.
The method of claim 1,
The step c) is a manufacturing method of the proximity sensor, characterized in that the depth is 1/3 to 1/2 of the thickness of the printed circuit board, the horizontal groove having a width of 0.15 ~ 0.3mm in the printed circuit board.
제1항에 있어서,
상기 e)단계는 상기 차광봉지부의 상부에 상기 투광봉지부의 일측 렌즈부 및 타측 렌즈부의 주변에 상기 일측 렌즈부 및 타측 렌즈부의 높이보다 높게 돌출형성된 돌출부가 일체로 구비되도록 형성하는 것을 특징으로 하는 근접센서의 제조방법.
The method of claim 1,
The step (e) is characterized in that the protruding portion formed protruding higher than the height of the one lens portion and the other lens portion integrally formed around the one side lens portion and the other lens portion of the light-transmissive sealing portion on the top of the light-shielding encapsulation unit. Method of manufacturing the sensor.
KR1020110119340A 2011-11-16 2011-11-16 Method for manufacturing proximity sensor KR20120087779A (en)

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KR101313623B1 (en) * 2012-11-08 2013-10-02 (주)신오전자 Optical proximity sensor with ambient light sensor
KR101313626B1 (en) * 2012-11-08 2013-10-02 (주)신오전자 Optical proximity sensor with ambient light sensor
KR101336781B1 (en) * 2012-11-09 2013-12-04 (주)신오전자 Optical proximity sensor with ambient light sensor and method of making the same
WO2014073905A1 (en) * 2012-11-09 2014-05-15 (주)신오전자 Optical proximity sensor, and method for manufacturing same
WO2015032852A1 (en) * 2013-09-04 2015-03-12 Zentrum Mikroelektronik Dresden Ag Optical lens with ambient light sensing
CN112992698A (en) * 2019-12-02 2021-06-18 光宝科技新加坡私人有限公司 Method for manufacturing optical module

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101313623B1 (en) * 2012-11-08 2013-10-02 (주)신오전자 Optical proximity sensor with ambient light sensor
KR101313626B1 (en) * 2012-11-08 2013-10-02 (주)신오전자 Optical proximity sensor with ambient light sensor
KR101336781B1 (en) * 2012-11-09 2013-12-04 (주)신오전자 Optical proximity sensor with ambient light sensor and method of making the same
WO2014073905A1 (en) * 2012-11-09 2014-05-15 (주)신오전자 Optical proximity sensor, and method for manufacturing same
WO2015032852A1 (en) * 2013-09-04 2015-03-12 Zentrum Mikroelektronik Dresden Ag Optical lens with ambient light sensing
KR20160052650A (en) * 2013-09-04 2016-05-12 첸트룸 미크로엘렉트로닉 드레스덴 악치엔게젤샤프트 Optical lens with ambient light sensing
US10031020B2 (en) 2013-09-04 2018-07-24 Idt Europe Gmbh Ambient light sensing die within an optical lens
CN112992698A (en) * 2019-12-02 2021-06-18 光宝科技新加坡私人有限公司 Method for manufacturing optical module

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