KR100762787B1 - Both faces flexible pcb touch pad - Google Patents

Both faces flexible pcb touch pad Download PDF

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Publication number
KR100762787B1
KR100762787B1 KR1020070025862A KR20070025862A KR100762787B1 KR 100762787 B1 KR100762787 B1 KR 100762787B1 KR 1020070025862 A KR1020070025862 A KR 1020070025862A KR 20070025862 A KR20070025862 A KR 20070025862A KR 100762787 B1 KR100762787 B1 KR 100762787B1
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South Korea
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layer
touch pad
coating
silver
nano
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KR1020070025862A
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Korean (ko)
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박찬학
박용찬
엄종철
이기룡
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주식회사 에프엔텍
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03547—Touch pads, in which fingers can move on a surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nanotechnology (AREA)
  • Human Computer Interaction (AREA)
  • Composite Materials (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Position Input By Displaying (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

A both-sided FPCB(Flexible Printed Circuit Board) touch pad applied with nano coating is provided to form coating layers by spraying gold(Au) or silver(Ag) nano particles on upper and bottom surfaces of the touch pad in a vacuum state, thereby minimizing leaked light of an LED(Light Emitting Diode) and according reducing power consumption. A both-sided FPCB(Flexible Printed Circuit Board) touch pad applied with nano coating comprises a sensor layer(10') and a component mount layer(40'). The touch pad further comprises the followings: a first coating layer(50) which is made by spreading gold(Au) or silver(Ag) nano particles on an upper surface of the sensor layer in a vacuum state; and a second coating layer(60) which is made by spreading gold(Au) or silver(Ag) nano particles in a bottom surface of the component mount layer in the vacuum state.

Description

나노코팅을 적용한 양면 플렉시블 피시비 터치패드{Both faces flexible PCB touch pad}Double-faced Flexible PCB Touch Pad with Nano Coating {Both faces flexible PCB touch pad}

도 1은 종래기술에 따른 4층 리기드 피시비 터치패드를 분해한 도면,1 is an exploded view of a four-layer rigid PCB touch pad according to the prior art;

도 2는 종래기술에 따른 양면 플렉시블 피시비 터치패드를 분해한 도면,2 is an exploded view illustrating a double-sided flexible PCB touch pad according to the prior art;

도 3은 본 발명에 따른 나노코팅을 적용한 양면 플렉시블 피시비 터치패드를 분해한 도면이다.3 is an exploded view illustrating a double-sided flexible PCB touch pad to which a nano coating according to the present invention is applied.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

9 : 버튼9: button

10' : 센서층10 ': sensor layer

40' : 부품실장층40 ': Component mounting layer

50 : 제1코팅층50: first coating layer

60 : 제2코팅층60: second coating layer

본 발명은 이동통신 단말기 등에 사용되는 터치패드에 관한 것으로, 보다 상세하게는 터치패드의 상면 및 저면에 전도성이 우수한 금(Au) 또는 은(Ag) 등의 나노입자를 진공상태에서 분사하여 코팅층을 형성시킴으로써 발생되는 노이즈를 감소시켜 터치패드의 신호감도를 높이고, 누설되는 LED의 빛을 최소화하여 전력소비를 줄일 수 있도록 한 나노코팅을 적용한 양면 플렉시블 피시비 터치패드에 관한 것이다.The present invention relates to a touch pad used in a mobile communication terminal, and more particularly, the coating layer is sprayed in a vacuum state by spraying nanoparticles such as gold (Au) or silver (Ag) having excellent conductivity on the upper and lower surfaces of the touch pad. The present invention relates to a double-sided flexible PCB touch pad applied with nano-coating to reduce the noise generated by forming the signal to increase the signal sensitivity of the touch pad and to minimize the light leakage of the LED to reduce power consumption.

일반적으로, 터치패드(Touch Pad)라 함은, 평면 모양의 포인팅 디바이스로 표면에 손가락을 대어서 조작하도록 만들어진 것이다. 터치패드를 트랙패드(Track Pad)라 칭하기도 한다.Generally, a touch pad is a touch device that is designed to be operated by placing a finger on a surface with a flat pointing device. The touch pad is also called a track pad.

또한, 터치패드는 그 편의성 때문에 휴대용 컴퓨터, 이동통신 단말기에 많이 사용되고, PCB, 돔쉬트, 코팅지로 이루어진 구성을 0.5T(두께단위) 미만의 리기드(Rigid) 또는 플렉시블(Flexible) PCB로 그 기능을 구현하는 입력장치이다.In addition, the touchpad is widely used in portable computers and mobile communication terminals because of its convenience, and the PCB, dome sheet, and coated paper may be composed of a rigid or flexible PCB of less than 0.5T (thickness unit). Input device that implements.

이러한 상기의 터채패드는 고질적으로 AC출력을 사용하는 부품(LCD 모듈, EL sheet, Battery 등), 방전 및 습기 등에 매우 민감한 특징을 가지고 있기 때문에, 설계상 많은 어려움을 겪고 있으며 판매된 이 후에도 이러한 이유들로 개선을 위한 노력이 계속 되고 있다.These touch pads have characteristics that are very sensitive to parts (LCD modules, EL sheets, batteries, etc.), discharge, and moisture that use AC output inherently, and thus suffer from design difficulties. Efforts are being made to improve these.

상기한 문제점을 해결하기 위해 종래에는 터치패드가 안정적으로 구현되도록 4층 리기드 피시비 터치패드를 사용하는 바, 도 1에 도시된 바와 같이, 상기 4층 리기드 피시비 터치패드는 버튼(9)으로 사용자의 손가락이 터치될 때 정전용량을 감지하는 센서(도시는 생략함)를 다수개 갖는 센서층(10)과; 상기 센서층(10)의 저면에 형성되되, 상기 센서층(10)에 구비된 센서 또는 주위 부품(도시는 생략함)에서 발생되는 노이즈(Noise)를 제거하는 GND(그라운드)층(20)과; 상기 GND층(20)의 저면에 형성되되, 상기 센서층(10)의 센서 감지시 동작하는 각종 부품들(도시는 생략함)을 실장하고 있는 부품실장층(40)으로 구성된다.In order to solve the above problem, conventionally, a four-layer rigid PCB touch pad is used to stably implement the touch pad. As illustrated in FIG. 1, the four-layer rigid PCB touch pad is a button 9. A sensor layer 10 having a plurality of sensors (not shown) for detecting capacitance when a user's finger is touched; A GND (ground) layer 20 formed on a bottom surface of the sensor layer 10 to remove noise generated from a sensor or peripheral components (not shown) provided in the sensor layer 10; ; The component mounting layer 40 is formed on the bottom surface of the GND layer 20 and mounts various components (not shown) that operate when the sensor layer 10 detects the sensor.

한편, GND층(20)과 부품실장층(40) 사이에는, 4층 리기드 피시비 터치패드 제조시 에칭되어 없어지는 층(도시는 생략함)이 있다.On the other hand, between the GND layer 20 and the component mounting layer 40, there is a layer (not shown) which is etched away during manufacture of the four-layer rigid PCB touch pad.

그러나, 상기와 같이 구성된 4층 리기드 피시비 터치패드는 슬림화 및 경량화하기 힘든 문제점이 있었다.However, the four-layer rigid PCB touch pad configured as described above has a problem that it is difficult to slim down and light weight.

또한, 종래에는 상기한 문제점을 해결하기 위해 양면 플렉시블 피시비 터치패드를 사용하는 바, 도 2에 도시된 바와 같이, 상기 양면 플렉시블 피시비 터치패드는 버튼(9)으로 사용자의 손가락이 터치될 때 정전용량을 감지하는 센서(도시는 생략함)를 다수개 갖는 센서층(10')과; 상기 센서층(10')의 저면에 형성되되, 상기 센서층(10')의 센서 감지시 동작하는 각종 부품들(도시는 생략함)을 실장하고 있는 부품실장층(40')으로 구성된다.In addition, conventionally, a double-sided flexible PCB touch pad is used to solve the above problem. As shown in FIG. 2, the double-sided flexible PCB touch pad has a capacitance when a user's finger is touched by a button 9. A sensor layer (10 ') having a plurality of sensors (not shown) for detecting the number; The component mounting layer 40 'is formed on the bottom surface of the sensor layer 10' and mounts various components (not shown) that operate when the sensor of the sensor layer 10 'is sensed.

그러나, 상기와 같이 구성된 종래기술에 따른 양면 플렉시블 피시비 터치패드는 디자인의 단순화, 경량화로 인하여 도 1의 4층 리기드 피시비 터치패드 대신에 많이 사용되지만, 부품실장층 혹은 근접한 외부 부품 등에서 발생할 수 있는 잡음에 노출되어 그 기능성을 신뢰할 수 없는 문제점이 있었다.However, the double-sided flexible PCB touch pad according to the prior art configured as described above is used in place of the four-layer rigid PCB touch pad of FIG. 1 due to the simplification and light weight of the design, but may occur in a component mounting layer or an adjacent external component. There was a problem that the functionality is unreliable due to exposure to noise.

한편, 전자부품의 회로를 설계할 경우 EMI, ESD에 대한 내성을 고려하여 R, L, C 수동소자들을 이용한 필터 회로를 추가 하거나 회로에서 발생되는 노이즈를 제거해주는 그라운드 영역을 확보해야만 하는데 앞서서 언급하였듯이 이러한 필터회로의 추가나 그라운드 영역의 확보는 슬림화 및 경량화 하기 힘든 문제점이 있으므로 실제로 적용되기에는 어렵다.On the other hand, when designing circuits for electronic components, considering the immunity to EMI and ESD, it is necessary to add a filter circuit using R, L, and C passive elements or to secure a ground area to remove noise generated from the circuit. The addition of such a filter circuit or the securing of the ground area is difficult to be applied because it is difficult to slim down and light weight.

따라서, 본 발명은 상기한 종래 기술에 따른 제반 문제점을 해결하기 위하여 제안된 것으로서, 본 발명의 목적은 터치패드의 상면 및 저면에 전도성이 우수한 금(Au) 또는 은(Ag) 등의 나노입자를 진공상태에서 분사하여 코팅층을 형성시킴으로써 발생되는 노이즈를 감소시켜 터치패드의 신호감도를 높이고, 누설되는 LED의 빛을 최소화하여 전력소비를 줄일 수 있도록 한 나노코팅을 적용한 양면 플렉시블 피시비 터치패드를 제공하는 데 있다.Therefore, the present invention has been proposed to solve the above problems according to the prior art, an object of the present invention is to provide nanoparticles such as gold (Au) or silver (Ag) having excellent conductivity on the upper and lower surfaces of the touch pad. It provides a double-sided flexible PCB touch pad with nano coating to reduce the noise generated by spraying in a vacuum to form a coating layer to increase the signal sensitivity of the touch pad, and to minimize the light leakage LED to reduce power consumption. There is.

상기한 목적을 달성하기 위한 본 발명에 따른 나노코팅을 적용한 양면 플렉시블 피시비 터치패드의 특징은,
버튼(9)으로 사용자의 손가락이 터치될 때 정전용량을 감지하는 센서를 다수개 갖는 센서층(10')과, 상기 센서층(10')의 저면에 형성되되, 상기 센서층(10')의 센서 감지시 동작하는 각종 부품들을 실장하고 있는 부품실장층(40')으로 구성된 나노코팅을 적용한 양면 플렉시블 피시비 터치패드에 있어서,
상기 센서층(10')의 상면에 금(Au) 또는 은(Ag)의 나노입자를 진공상태에서 분사하여 만든 제1코팅층(50)과;
상기 부품실장층(40')의 저면에 금(Au) 또는 은(Ag)의 나노입자를 진공상태에서 분사하여 만든 제2코팅층(60)을 더 구비한다.Features of the double-sided flexible PCB touch pad to which the nano-coating according to the present invention for achieving the above object is achieved,
A sensor layer 10 'having a plurality of sensors for sensing capacitance when a user's finger is touched by a button 9 and a bottom surface of the sensor layer 10' are formed, and the sensor layer 10 ' In the double-sided flexible PCB touch pad to which the nano-coating composed of the component mounting layer 40 'mounting various components that operate when the sensor is detected,
A first coating layer 50 formed by spraying gold (Au) or silver (Ag) nanoparticles on the upper surface of the sensor layer 10 'in a vacuum state;
A second coating layer 60 is further provided on the bottom surface of the component mounting layer 40 'by injecting nanoparticles of gold (Au) or silver (Ag) in a vacuum state.

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이하, 본 발명에 따른 나노코팅을 적용한 양면 플렉시블 피시비 터치패드의 바람직한 실시 예를 첨부한 도면을 참조하여 설명하면 다음과 같다.Hereinafter, a preferred embodiment of a double-sided flexible PCB touch pad to which the nanocoating according to the present invention is applied will be described with reference to the accompanying drawings.

도 3은 본 발명에 따른 나노코팅을 적용한 양면 플렉시블 피시비 터치패드를 분해한 도면이다.3 is an exploded view illustrating a double-sided flexible PCB touch pad to which a nano coating according to the present invention is applied.

도 3에 도시된 바와 같이, 본 발명에 따른 나노코팅을 적용한 양면 플렉시블 피시비 터치패드는 버튼(9)으로 사용자의 손가락이 터치될 때 정전용량을 감지하는 센서(도시는 생략함)를 다수개 갖는 센서층(10')과; 상기 센서층(10')의 저면에 형성되되, 상기 센서층(10')의 센서 감지시 동작하는 각종 부품들(도시는 생략함)을 실장하고 있는 부품실장층(40')과; 상기 센서층(10')의 상면에 전도성이 우수한 금(Au) 또는 은(Ag) 등의 나노입자를 진공상태에서 분사하여 만든 제1코팅층(50)과; 상기 부품실장층(40')의 저면에 전도성이 우수한 금(Au) 또는 은(Ag) 등의 나노입자를 진공상태에서 분사하여 만든 제2코팅층(60)으로 구성된다.As shown in FIG. 3, the double-sided flexible PCB touch pad to which the nano-coating according to the present invention is applied has a plurality of sensors (not shown) which detect capacitance when a user's finger is touched with a button 9. Sensor layer 10 '; A component mounting layer 40 'formed on a bottom surface of the sensor layer 10' and mounting various components (not shown) that operate when a sensor of the sensor layer 10 'is sensed; A first coating layer 50 formed by spraying nanoparticles such as gold (Au) or silver (Ag) having excellent conductivity on the upper surface of the sensor layer 10 'in a vacuum state; The second coating layer 60 is formed by spraying nanoparticles such as gold (Au) or silver (Ag) having excellent conductivity on the bottom surface of the component mounting layer 40 'in a vacuum state.

상기와 같이 구성된 나노코팅을 적용한 양면 플렉시블 피시비 터치패드는 종래의 4층 리기드 피시비 터치패드 또는 양면 플렉시블 피시비 터치패드와 같은 방법으로 동작되는 바, 상기 나노코팅을 적용한 양면 플렉시블 피시비 터치패드의 동작은 생략하기로 하고, 본 발명의 특징이 부분의 기능을 좀 더 살펴보면 다음과 같다.The double-sided flexible PCB touch pad to which the nano coating is configured as described above is operated in the same manner as a conventional 4-layer rigid PCB touch pad or a double-sided flexible PCB touch pad, and the operation of the double-sided flexible PCB touch pad to which the nano coating is applied is performed. To omit, the features of the present invention will be described in more detail as follows.

상기 본 발명의 특징부분은 리기드 플렉시블 피시비의 표면에 전도성이 우수한 금(Au), 은(Ag) 등의 나노입자를 진공상태에서 분사하는 표면처리 방식의 한가지로써 4dB ∼ 5dB 가량의 수신감도를 증가할 수 있으며, 뛰어난 방전 차폐기능을 가지고 있으며,The feature of the present invention is a surface treatment method of spraying nanoparticles such as gold (Au) and silver (Ag) having excellent conductivity on the surface of a rigid flexible PCB in a vacuum state, and has a reception sensitivity of about 4dB to 5dB. Can be increased, has excellent discharge shielding,

더욱이 금(Au) 또는 은(Ag)의 나노입자 때문에 누설되는 LED의 빛을 최소화 하여 전력소비를 줄일 수 있으며 이로써 얻어지는 잉여공간(예를 들어, LED의 숫자를 줄일 수 있음)을 활용할 수 있게 된다.Furthermore, due to the nanoparticles of gold (Au) or silver (Ag), the light leakage of the LEDs can be minimized to reduce power consumption, and thus the excess space (for example, the number of LEDs) can be utilized. .

이상에서 상술한 바와 같이 본 발명은 터치패드의 상면 및 저면에 전도성이 우수한 금(Au) 또는 은(Ag) 등의 나노입자를 진공상태에서 분사하여 코팅층을 형성시킴으로써 누설되는 LED의 빛을 최소화하여 전력소비를 줄일 수 있도록 한 효과가 있다.As described above, the present invention minimizes the light of the leaked LED by forming a coating layer by spraying nanoparticles such as gold (Au) or silver (Ag) having excellent conductivity on the upper and lower surfaces of the touch pad in a vacuum state. This has the effect of reducing power consumption.

또한, 본 발명은 터치패드의 상면 및 저면에 전도성이 우수한 금(Au), 은(Ag) 등 의 나노입자를 진공상태에서 분사하는 표면처리 방식의 한가지로써 4dB ∼ 5dB 가량의 수신감도를 증가할 수 있는 효과가 있고, 뛰어난 방전 차폐기능을 가지고 있는 효과가 있다.In addition, the present invention is a surface treatment method of spraying nanoparticles, such as gold (Au), silver (Ag), etc., which have excellent conductivity on the upper and lower surfaces of the touch pad in a vacuum state, to increase reception sensitivity of about 4dB to 5dB. It can be effective, and has the effect of excellent discharge shielding function.

그리고, 본 발명은 금(Au) 또는 은(Ag)의 나노입자 때문에 누설되는 LED의 빛을 최소화 하여 전력소비를 줄일 수 있는 바, 이로써 얻어지는 잉여공간을 활용할 수 있는 효과가 있다.In addition, the present invention can reduce the power consumption by minimizing the light of the LED leaked due to the nanoparticles of gold (Au) or silver (Ag), there is an effect that can utilize the excess space obtained thereby.

특히, 본 발명은 나노코팅을 진공상태에서 압착 분사하는 방식으로 이루어지기 때문에 두께가 0.2um ∼ 0.3um로 매우 얇아지는 바, 전체 피시비의 두께를 줄일 수 있는 효과가 있다.In particular, since the present invention is made by a method in which the nano-coating is carried out by compression injection in a vacuum, the thickness is very thin to 0.2um ~ 0.3um bar, there is an effect that can reduce the thickness of the entire PCB.

또한, 본 발명은 플렉시블 피시비의 경우 제작 후 제품의 신뢰성을 테스트 하기 위하여 밴딩테스트(bending test), 슬라이딩테스트(sliding test)를 실시하는데 일반 나노코팅을 하지 않은 플렉시블 피시비의 경우 시료에 따라 편차가 있지만 100 ∼ 120k회 이 후 크랙이 발생하는데 비하여 나노코팅을 적용한 플렉시블 피시비의 경우 400k 회 이 후 에도 크랙이 발생하지 않음으로 내구성 면에서도 크게 효율을 기대할 수 있다.In addition, the present invention performs a bending test, a sliding test in order to test the reliability of the product in the case of the flexible PCB, but in the case of the flexible PCB without the general nano-coating, there are variations depending on the sample Cracks occur after 100 to 120k times, whereas flexible PCBs with nano-coatings do not generate cracks after 400k times, so efficiency can be expected in terms of durability.

Claims (1)

버튼(9)으로 사용자의 손가락이 터치될 때 정전용량을 감지하는 센서를 다수개 갖는 센서층(10')과, 상기 센서층(10')의 저면에 형성되되, 상기 센서층(10')의 센서 감지시 동작하는 각종 부품들을 실장하고 있는 부품실장층(40')으로 구성된 나노코팅을 적용한 양면 플렉시블 피시비 터치패드에 있어서,A sensor layer 10 'having a plurality of sensors for sensing capacitance when a user's finger is touched by a button 9 and a bottom surface of the sensor layer 10' are formed, and the sensor layer 10 ' In the double-sided flexible PCB touch pad to which the nano-coating composed of the component mounting layer 40 'mounting various components that operate when the sensor is detected, 상기 센서층(10')의 상면에 금(Au) 또는 은(Ag)의 나노입자를 진공상태에서 분사하여 만든 제1코팅층(50)과;A first coating layer 50 formed by spraying gold (Au) or silver (Ag) nanoparticles on the upper surface of the sensor layer 10 'in a vacuum state; 상기 부품실장층(40')의 저면에 금(Au) 또는 은(Ag)의 나노입자를 진공상태에서 분사하여 만든 제2코팅층(60)을 더 구비한 것을 특징으로 하는 나노코팅을 적용한 양면 플렉시블 피시비 터치패드.Double-sided flexible with nano-coating characterized in that the bottom surface of the component mounting layer 40 'further comprises a second coating layer 60 made by spraying nanoparticles of gold (Au) or silver (Ag) in a vacuum state. PC touchpad.
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