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2024-07-31

Membrane Switch Printing Process

Characteristics As we all know, the Switch in the electronic machine product, plays a role in the transmission of command information. There are many types of switches, and their development is constantly updated with the advancement of electronic machine products. In the 1950s, the toggle switch of the struggling component was used to toggle the switch, and the changeover switch dominated; in the 1960s, a combination switch represented by a key switch was introduced to accomplish a simple function conversion; as the application field expanded and the function of the whole machine increased. In the 1970s, there was a switch of conductive rubber. The switch was a new type of electronic device that was developed in the late 1970s and early 1980s. It was a miniaturization and digitization of products conforming to the electronics industry. Intelligent, multi-functional development needs products.
The Membrane Switch is a switch made by printing a contact circuit with a conductive paste on a flexible polycarbonate or a polyester film and is a type of contact switch.
Membrane switch is a flat type, multi-layer combination, and a sealed structure. It is an assembly of an electronic whole machine operating system that incorporates key switches, panel function marks, readings display transparent windows, indicator window holes and circuits.
It has the following features:(1) The durability of the durable membrane switch can generally reach more than one
2024-07-31

Membrane Switch Manufacturing Technology

Membrane Switches are composed of multiple layers of thin films. They utilize different material properties and play different roles to complete the function of membrane switches in electrical products. The circuit layer is the main functional layer of the Membrane Switch. It is an electronic circuit designed according to the functions required by the circuit product. The conductive silver paste or conductive carbon paste is Screen printed on PVC, PC or PET, and then the panel layer and the isolation layer. Synthetic membrane Switch .
In the current manufacture of thin film switch circuit layers, screen printed silver paste is prone to the following problems:
1. Silver migration on PET sheet.
2. Membrane switch in use, silver wire breakage.
3. The resistance of the circuit rises.
How to understand, prevent and control the above issues? Here will be a description of the silver paste ED427, 478 and carbon paste 423 produced dedicated to membrane switch, flexible circuit, resistance printing, and hope to give you some help for reference:Causes and Prevention of Silver Migration on PET Sheets
1. Several factors that affect silver migration:
A. The distance between screen printing silver paste circuits (wires).
B. The potential between screen printed silver paste circuits (wires).
C. Existing dielectrics.
D. Silver alloy pigments.
E. The integrity of the existing protective layer and its insulating prot
2024-07-31

Membrane Switch Manufacturing Technology

Membrane Switches have a decorative function and a marking function that are provided by a conventional panel. Besides a Switch element and a switch function of the switch element, the thin film switch also has a switch connection and a lead line (that is, a switch circuit) function that connects the switch element and the host circuit. With the readings showing the transparent window and the indicator light transparent window function, the Membrane Switch is neither a single new type of panel nor a single switch element, but an electronic whole product set with functions and decorations is a novel electronic device.
1. Functional inkColor design, color reproducibility, and color rendering of ink are important factors in evaluating the quality of the membrane switch. However, the more important factor in evaluating the performance of the membrane switch is the conduction function of the membrane switch and the reliability of the conductive circuit. Even if the membrane switch panel layer has a good color design, color reproducibility, and color rendering of the ink, if the switch's conduction function and the reliability of the conductive circuit are lost, everything is awkward.
2. Substrate processingThe functional ink (silver paste) in the membrane switch is printed on the polyester film (PET) by Screen printing. Because of the relationship between the characteristics of the silver paste and the PET properties, a certain number
2024-07-31

Membrane Switch Manufacturing Process

First, the origin and classification of Membrane Switch:
1.Origin:The graphics are produced on the film substrate, the entire component is a Switch function, which is called the membrane switch, English name Membrane Switches.By several layers of different materials, the film is bonded into a finished product, the thickness is about 1,2 ~ 2,5 MM, the appearance of such as a plate, both the panel and switch the dual role, it is also known as the panel switch, English name PANEL SWITCHES, or called sheet switch.Because this kind of switch action stroke is short, only about 0.25~0.5MM, the switch pressing pressure is 0.5~1N, more sensitive, the touch of the hand completes the switch action, it is also called touch switch, or touch the Keyboard.2.Classification:Divided into flexible board and rigid board according to circuit substrateAccording to the panel shape is divided into flat or stereoAccording to operating experience, it is divided into non-inductive and inductiveDivided into transparent and finger touch Screen type according to special purposeAccording to the combination of panels and discrete parts and keycaps and keyboardsHere, we only discuss the use of flexible sheet membrane switch (R) sheets and printed materials.Second, the membrane switch structure and the current R structure1. Structure: Flexible board (R) and rigid board (Y)R structure: membrane switch panel layer, isolation layer, circuit layer all from a variety of different prope
2024-07-31

What are the principles of membrane switches?

We have heard of the Membrane Switch in our life. It is actually a kind of Switch Button . Now the technology is developed, and the switch has been designed into a new look, so it is called a membrane switch, then you all know what the principle of it, as well as membrane switch is what constitutes,the next introduce membrane switch membrane switch and what are the principles of what constitutes, hope your reference.
1. What are the principles of the membrane switch?
(1)For the sake of everyone, the membrane switch is a multi-layer (planar) type (non-locking) button switch composed of a layer of insulating material with certain elasticity, but the integrated circuit. buttons, indicating components, instrument panels, etc. The function is one. The action of the membrane switch is only achieved by the elastic movement of the elastic membrane in a vertical direction. Although the elastic membrane undergoes a million peristaltic movements, the amplitude of the elastic membrane is small.(2)Next, it is only 0.1-0.3MM, but with the rationality of material selection, the film material can withstand more than one million times of life without deformation, which determines the durability of the membrane switch.
(3) What's more, the membrane switch has beautiful appearance, long service life, simple structure, convenient installation, good hand feeling, and small footprint. It is widely used in all walks of life, from home appliances to high-tech prod
2024-07-31

Membrane Switch Damage Troubleshooting Method

Membrane Switches appear in every corner of our daily lives: washing machines,microwaves and every instrument you use at work.About 80% of electrical equipment uses membrane switches.Once one of the switches fails,how do we troubleshoot and fix it?
KD will explain how to troubleshoot and repair Membrane Switch faults.
The first step is to find the damaged part.Press all the buttons to see if the various functions of the device are activated.
If only 1 or 2 buttons do not respond,the metal dome may be damaged or displaced.We can heat the product for five to ten minutes with the hot air from a hair dryer.The aim is to reduce the viscosity of the adhesive by heating it.
The third layer at the bottom of the membrane Switch is the metal dome,which we can remove to check or replace the dome.
If neither THR Button responds,then we need to check whether the terminal housing at the end of the circuit is loose or damaged.Also,don't forget to check the internal circuits.Once the circuit fails,we need to replace the entire membrane switch.
To replace the membrane switch panel of the same model and specification,we only need to remove the control panel.The operation is very simple.Read this article :5 large membrane switch installation errors will help you avoid installation errors.
If you don't have a membrane switch panel,microswitches are also an option.The circuit design should follow the old membrane switch.As for the insta
2024-07-31

Advantages And Disadvantages Of Different Types Of Membrane Switches

Membrane Switch panels have evolved over the decades since their inception and continue to be used in a wide range of industries and devices. In order to adapt to different situations and better serve different user groups, different membrane Switch structures and manufacturing processes have been differentiated. As a result, Membrane Switches began to differentiate into different types.

KD will sort out the most important membrane switch types and explain the advantages and disadvantages of each.

1. Metal Dome Membrane Switch
This type of membrane switch is the one we are most familiar with. It uses a metal dome as a conducting medium.
Advantages:
Good tactile sensation;
Clear audio feedback;
Operating temperature range :-20℃~80℃.
Disadvantages: If the equipment surface or liner is not smooth, it may cause short circuit or the key does not rebound.
Recommendation :KD recommends that the metal dome membrane switch be fixed on a flat surface for use.

2. Molded film switch
Through the "press mold", the silver paste plate of the upper loop Button is pressed into a certain spherical crown with a mold to produce a certain elasticity.
Advantages:
Long service life, button times up to 500,000 times;
Good tactile sensation;
Key strength can be customized upon request.
Disadvantages:
High cost of bonding mode.
High temperatures could lead to weaker key rallies.

3.
2024-07-31

Introduction To 5 Types Of Pcb Surface Finishing For Membrane Switch

PCB surface machining has two uses. One is to protect exposed copper circuits and the other is to ensure solderability. Differences in materials used can affect price, shelf life, reliability and assembly processing.
Type of surface treatment1. HASL(hot air welding leveling). Lead and lead-freeThis has been the dominant method for a long time. The process involves dipping the circuit board into a tin/lead alloy and then blowing hot air to remove excess solder.2. Soak tin Dip the metal tinTin directly applied to the base metal is an affordable alternative to other surface treatments. When tin and copper are mixed together, they diffuse into each other because of their affinity.3.OSP(Organic solderable Preservative)/ EntekOSP prevents copper oxidation by applying very thin water-based organic compounds. Compared to other toxic compounds, it is very environmentally friendly. This is a low cost solution and a fairly popular option.
4. Chemical Impregnated Nickel gold (ENIG)This is the best surface finish currently in use and, despite the higher cost, it allows for a flat surface with excellent solderability. When used, the gold actually dissolves in the solder, so it doesn't tarnish or oxidize. This is a two-layer process in which copper is first coated with a layer of nickel, rather than adding a layer of gold.5. Immersion silverIt is a medium cost finished product popular in North America and Europe due to RoHS and WEEE regulations. It is a good alternative to
2024-07-31

Comparison Of Connection Methods Of Membrane Switch Led

LED is a solid-state semiconductor light source. Its luminous principle is essentially an electron transition. Led, as a colorful light source, has the characteristics of small size, high brightness, long life, low voltage, high safety, fast response, and so on. At the same time, the output brightness can be adjusted in a wide range. Therefore, it is widely used in daily life, such as billboards, various electronic products, various devices, handheld devices and so on.Now many LED products use constant current drive method to drive LED. The connection mode of LED also varies according to the actual circuit needs. There are generally four types: series, parallel, hybrid and array.
1. Series MethodThis series circuit is relatively simple. The current flowing through the LED during operation is consistent and stable. Since LED is a current-type device, it can basically ensure that the luminous intensity of each LED is consistent. The circuit with this LED connection mode is simple and convenient to connect. However, there is also a fatal disadvantage, that is, when one of the LED open circuit failure, the whole LED string will be extinguished, affecting the reliability of the use. This requires to ensure that the quality of each LED is excellent, so that the reliability will be improved accordingly.Series methodIt is worth noting that if the LED constant voltage drive power supply is used to drive the LED, when one of the LED short-circuit, the circuit current will increase.
2024-07-31

Membrane Switch Printing Proces

1.CharacteristicsAs is known to all,Membrane Keypad plays a role in delivering instruction information in electronic products.There are many varieties of Switch,its development with the progress of electronic complete machine products and constantly updated.In the 1950s toggle switch,toggle switch,switch conversion dominant position; In the 1960s,the combination switch represented by the key switch appeared to complete the simple function conversion; With the expansion of the application field and the increase of the function of the machine,the Keyboard switch of conductive rubber appeared in the 1970s,and the Membrane Switch is a new electronic device developed in the late 1970s and early 1980s.It is the product of the development of electronic machine products to miniaturization,digitization,intelligence and multi-function.Thin film switch is a kind of contact switch made by printing contact circuit with conductive paste on flexible poly-carbonate or polyester film.Membrane switch is planar,multi-layer combination,sealed structure,is set key switch,panel function mark,reading display transparent window,indicator window hole and circuit as one of the electronic complete machine operating system assembly.
(1) DurabilityThe life of the membrane switch can generally reach more than a million times,the reason for such a long life is that the switch action is only realized by the vertical movement of the elastic film.Although the elastic film aft
2024-07-31

Graphic Overlay Membrane Switch Assembly Process

1. Put the silk-printed line into the oven for 40 minutes at 115 degrees Celsius.2. After the Membrane Circuit is baked, simply assemble a piece, test whether the circuit has short circuit, open circuit, excessive resistance and other phenomena, and correct the problems in time.3. Stick the tail line: after testing the single-line resistance of the baked line, stick the tail from the outlet hole to the 1mm place where the carbon pulp coincides with the appropriate transparent adhesive.4. Tail line: Use a ruler with glue to line the inside of the outlet hole from top to bottom to the tail line.5. Make interlace: Membrane Keypad,lay a piece of waste line flat on a suitable interlace and stick it, tie down the center point of the line key with an awl, then draw a straight circle of 10 on the center point with a compass and knock it down. After knocking the circle, use a blade to knock a ventilation slot of 2mm between the circle and the circle. Note that there should be at least 3 circles connected. At the same time, care should be taken not to pass through the upper and lower line crossing points.6. Assembly line: first of all, the delimited circuit is pasted on the inter-layer of the hole that has been prepared. When pasting, the silver paste point should be placed in the middle of the inter-layer hole (note that the method should be as little as possible to stick bubbles) and then pasted on the line.7. Glue: Paste the glue that has been knocked on the circuit.8
2024-07-31

Characteristics And Application Of A Wide Variety Of Membrane Switch

1.CharacteristicAs is known to all, Membrane Keypad plays a role in delivering instruction information in electronic products. There are many varieties of Switch , its development with the progress of electronic complete machine products and constantly updated. In the 1950s toggle switch, toggle switch, switch conversion dominant position; In the 1960s, the combination switch represented by the key switch appeared to complete the simple function conversion; With the expansion of the application field and the increase of the function of the machine, the Keyboard switch of conductive rubber appeared in the 1970s, and the Membrane Switch is a new electronic device developed in the late 1970s and early 1980s. It is the product of the development of electronic machine products to miniaturization, digitization, intelligence and multi-function.Thin film switch is a kind of contact switch made by printing contact circuit with conductive paste on flexible poly-carbonate or polyester film.Membrane switch is planar, multi-layer combination, sealed structure, is set Membrane Circuit switch, panel function mark, reading display transparent window, indicator window hole and circuit as one of the electronic complete machine operating system assembly.
It has the following characteristics:(1) durabilityThe life of the Membrane Switch can generally reach more than a million times, the reason for such a long life is that the switch action is only real