Supply of high-quality metal dome,

Second, the metal dome sheet because of its good performance Guozi conduction performance between the operator and the product can play a good role in the switch to enable and control. Second, the metal dome possess stable resilience (Press and automatic back), can bring a sense of comfort to the operator touches. Meanwhile, the metal dome contact pressure of up to 100 million times long life, more body products provide the most cutting almost real quality support. Depending on the product structure and quality needs, metal dome can be a variety of different surface treatment nickel, silver, gold and so on. Third, the classification 1. The classification of dome shape: General conventional metal dome, divided according to their different shapes: round metal dome (sub waist round / oval two kinds), cross Dome Array, triangular pot Aberdeen sheet, rectangular metal dome 2.Diameter 0mm, efforts from 100g to 600gf, even 6,000gf (triangle shrapnel special diameter / material in order to achieve, rarely used) from 3mm to 2 ￠. Fourth, the metal dome sheet Key distinguish single conductive film and the metal dome sheet 1. The single custom conductive film (also called single-key conductive film), which is defined by a conductive film made of a metal dome, is suitable for a single switch. 2. Develop Guozi (custom conductive film), you can put a number Guozi a certain position, using PET with glue to stick them together for quick assembly and precise positioning. General board, in accordance with the circuit board corresponding PAD (pad) to arrange the position of each metal dome / metal dome of the location, as well as other components to avoid gaps and set the corresponding positioning holes and the like. This product is also known as Guozi conductive film or metal shrapnel dielectric film, Dome sheet. Sometimes, it said Guozi Fan also refers to this product. It is a contained metal shrapnel (Dome Array) of PET flakes used in PCB or FPC and other circuit board used as a switch between the user and the instrument plays an important role in the touch-type switch. Compared with conventional silicone keys, membrane keys feel better, longer life, can also be used indirectly to improve production efficiency of each conductive film type switch. V. Work Guozi of: metal shrapnel membrane keys located on the PCB board conductive parts (mostly in the finger above the circuit board), when is depressed, depressed center shrapnel, exposure to PCB on the line, thereby forming a loop, the current through, the product is able to work properly. Metal shrapnel (Dome Array), English metal dome, made of stainless steel, is an important part of the switch with the aid of metal shrapnel of continuity between the operator and the product functions as a high-quality switch effect. At the same time, the use of stable resilience Guozi (automatic return after pressing position), and long life, provide the operator with excellent tactile feedback. Shrapnel membrane switch is mainly used for printed circuit boards and other rigid plate. We can make no specifications upon request membrane keypad conductive film (membrane switch). In fact, these products are available upon drawings or requirements to do, and no such thing as standard parts or inventory goods. Sixth, the classification of a metal dome structure, a single-layer structure which is the most simple structure before the beginning of metal shrapnel located Mylar (with adhesive layer PET) below, there are ventilation holes to ensure the basic feel and use II. , double-layer structure with a single layer conductive film is different, it more than a layer Spacer (spacer), shrapnel better fit and above Mylar, and maintain good contact with the board, has a better feel (some like membrane switch 'bulge') In addition, two-layer structure conductive film vent to more effectively prevent the PET layer is shrapnel scratch burr burr, etc., but also can prevent dust from entering the PET layer. Three, EMI printed above Myalr of (viewed from the front of the product) is printed with a layer of silver - it is ESD (Electrostatic Discharge Control) EMI is mainly used to prevent static electricity generated by electronic and peripheral products to target electrical damage Fourth, Rubber glue on top of Mylar or EMI-layer printed layer Rubber glue (silica), so this type of product can be firmly glued to the PCB / FPC and other circuit board. Mainly for mobile phones, Internet telephony, various types of remote control, MP3 / MP4, radios, digital cameras, machine learning, game control keyboards, microwave ovens, automobile dashboards, binoculars, toys and so on. The polyester film previously used with the switch compared to having a better feel, longer life. Seven metal dome (metal shrapnel) packing method: Generally Guozi (metal shrapnel) There are four methods of packaging, packaging methods which select according to your requirements. These four methods are: direct use of PET bags; made of metal shrapnel (Dome Array) form a conductive film is directly attached to the top of the board; fitted with a pipe; with Reel. The latter two can be a good time to reduce the assembly, currently mainly used in foreign countries. Currently the most commonly used is the direct use of PET bags, and convenient. Eight, what is metal dome (metal shrapnel) intensity, strength and resilience CC value? Metal dome (metal shrapnel) Velocity (CP) refers to the maximum force from shrapnel OFF state to the ON circuit strength; rebound efforts (CL) refers to shrapnel from on return to the original state of maximum Rebound efforts. Usually in grams (g)) to represent the intensity, ranging from 100g to 600g, it can be changed according to customer requirements. The CC values ??are expressed in a formula: CC value = (CP-CL) / CP * 100%, CC value measure is feeling the metal dome, generally require between 35% to 60% too high, then it will affect the life of the metal dome. Nine, metal dome (metal shrapnel) fixing method? Two ways: one is some Guozi (metal shrapnel) itself with a foot, you can choose our metal dome (metal shrapnel) feet long pull according to the thickness of the sample. Mostly with foot triangular metal dome (metal shrapnel); the second is made into a metal dome (metal shrapnel) conductive film, it is directly attached to the back with glue up, the cost will be slightly higher. Ten, metal shrapnel conductive film specifications and technical parameters: Total height: 0.28-0.45 mm stroke: 0.13-0.30 mm velocity range: 100-400 gf efforts Tolerance: ± 30 gf Rebound:> 30% of the product life:> 1 million times salt spray test: v35 ± 2 ° C, 5 ± 0.1%, 48H Operating temperature: -20 ° C-50 ° C Humidity: <100% RH contact resistance: <1 ohm ESD resistance: <3 ohm tolerance : ± 0.05 - ± 0.15mm XI Guozi surface treatment nickel plating, silver plating, gold plating refers to one side of the stainless steel surface (typically metal dome contact surface concave) NI AG AU plating process, Its main role is to shield interference, together impedance reduction, increased contact current products and product features to meet with key sensitivity, after contact with the product, usually from small to large impedance as follows: gold plating (AU), plating silver (AG), electroless nickel (NI). Surface treatment also points single-sided, single-sided gold-plated gold-plated, double-sided gold-plated. Nickel-plated nickel has sided, double-sided nickel plated. Silver plated silver plated single-sided, double-sided silver-plated.