Patch membrane switch

Specifications

About EL-erjiguan.htm

    Shield is an integral part of membrane switch, since the role of the following or more:

   (1) the possible release of harmful static electricity safely, to avoid damage to sensitive electronic components.

   (2) shielding the membrane switch, from the surrounding environment of the radio frequency interference and electromagnetic interference.

   (3) by way of reflection or absorption to reduce or eliminate radio frequency interference and electromagnetic interference radiation.

    Shielding effectiveness and performance depends on the characteristics of shielding materials and structures, also depends on the frequency and distance of the source shield. EMI shielding is commonly used medical equipment, military, telecommunications and many other electronic devices. Because these devices installed new radiation and interference components, the importance of screening with this increase also.

I am a typical enterprise application assembly structure of the past as
    Conductive silver screen: usually printed on a polyester mesh structure to meet the special requirements of operation, this layer in the mask layer.

Design considerations:

   (1) According to the assembly conditions, mask layer material should have sufficient insulation to withstand static electricity, such as: thickness of 125μm polyester mask layer should be able to withstand 15kV voltage.

   (2) because it deals with the surface mask layer to provide adequate shielding, panel edges weaknesses and should be given careful consideration. Even if the mask layer of insulation very well near the edge of the electrostatic panel would interfere with mask layer around the edge through the circuit layer into the panel. I plant will be carefully designed to avoid such phenomena in order to ensure this protection.

   (3) My company's technical staff has experience in a variety of tablet that can help you solve a variety of special problems relating to shield.

   (4) The customer should provide a detailed description of the required shield. Some high-tech shield required expensive, but only when the special needs to consider using.

      Note: The magnetic field strength to reduce the frequency, shield materials and material thickness of the electrical conductivity. Weaken or reduce the radiation shielding materials, the level of energy efficiency and its shielding (SE) related. SE standard in decibels (dB). Its value before and after shielding the ratio of the electromagnetic field strength. SE value of each additional 20 dB, the performance of the electromagnetic interference shielding material by ten times less leakage values. A 60 dB shielding material to reduce the value of the magnetic field strength of the original value of the one thousandth (eg, from 5 volts / m to 5 mV / m).