Most Trusted Membrane Keypad Supplier 2022

08 Feb, 2022

By hqt

Microwave touch panel repair

If your microwave begins to behave in an unusual way, to turn on and off randomly, to increase or decrease the set time period during the program operation, to not respond at all to pressing, then the problem most likely lies in a faulty membrane by the membrane keypad supplier.

Possible malfunctions

The keypad built into the microwave oven consists of two films along which paths are located, conducting current and contact fields.

Most often, the problem in the operation of the touch panel becomes a consequence of some physical influences, which lead to the pressing of membranes, the damage of which can depend on even the slightest vibration.

To determine with absolute certainty that the cause of the problem is precisely in the sensor, and not in the microcontroller, it is recommended to check the entire board for faulty components using a multimeter.

After the results by the membrane keypad supplier have confirmed the defectiveness of the sensor, you should proceed to its direct repair.

Membrane Keypad Supplier

The Panel Recovery Procedure with membrane keypad supplier

To complete the panel recovery procedure, you will have to use the following tools:

  1. screwdriver;
  2. knife or office scissors;
  3. tweezers;
  4. insulating tape;
  5. Super glue.

From the very beginning, it is necessary to disconnect the device from the network, using a Phillips or five-pointed screwdriver, unscrew all the existing bolts that hold the cover. Next, you should very carefully disconnect the membrane loop and the control module, and also disconnect the relay from the terminals. 

After removing the plastic panel and the control module board, it is necessary to peel off the sensor film from the plastic and peel the membrane.

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Stages of Self-Restoration of membrane keypad

Self-restoration of the touch panel of a microwave oven consists of several rather difficult stages:

  1. on the closed side of the membrane, it is necessary to glue the electrical tape around the perimeter of the buttons, due to which the distance between the two films will increase, excluding the closure of the buttons;
  2. connect these two parts;
  3. Similarly, push the cable into the panel slot;
  4. Moreover, glue the film back.

After the sensor recovery procedure, it is necessary to assemble the device in the opposite sequence to disassembly. And if the microwave oven shows the panel’s perfect operation, then the recovery process was successful.

Membrane (membrane keypad)

The membrane keypad supplier has the most elegant, simple and durable solution for any type of keypad, equipment and devices. It has a number of indisputable advantages that make it possible to use this technology in various fields of industry: (medicine, instrument making, machine tool building, computer technology, military equipment).

  • Small thickness (from 0.5 mm)
  • Flexibility (R of gluing surface from 100 mm).
  • Dust and moisture protection (IP 67).
  • Reliability (1 million clicks).
Backlit membrane keypad

The membrane keypad consists of two parts –
electrical and decorative, glued together.

The decorative part of the membrane keypad by membrane keypad supplier is a niceone film (front film) with an image applied (on the inside). The film can be of several types:

  • Fine-grained (default).
  • Coarse-grained.
  • Silky (Soft Touch).
  • Glossy.

The electrical part of the membrane keypad can be of various types:

Niceone film comes with silver-conducting paste. The output is provided by a flexible FPC cable with a pitch of 1 mm. To protect against environmental influences, topology elements are covered with a protective graphite coating.

Polyimide film by membrane keypad supplier

The output is provided by a flexible FPC cable with a pitch of 1 mm. To protect against environmental influences, the topology elements come with protective graphite or gold coating (gold-plated contacts).

Rigid fiberglass printed circuit board. The output comes by any connector at the request of the Customer, wires, and cables. It is easy to equip with a flexible ultra-flat FPC cable with a pitch of 0.5 mm (inserted into the connector on the keypad board). Moreover, the soldering points protect with varnish.

The tactile effect of key presses can be achieved in several ways:

  • Forming (bulging) keys of membrane keypads. The tactile effect is created due to the elasticity of the mylar film. Similarly, the usual shape is round. Diameter – from 9 to 15 mm (as the diameter decreases, pressing the keys becomes more rigid). We recommend using a molding of 10-12 mm.
  • Metallic membranes. Keypads by membrane keypad supplier with metal domes provide a clearly felt tactile effect with a click when pressed. The keystroke feels well even through a thick glove. Also, metal membranes allow you to achieve a lower contact resistance of the key. In products of special equipment, metal membranes are, in most cases, the best option.
  • Variants of membrane keypads without tactile effect are possible (without membrane or molding / bulging). The tactile effect is not felt when pressed. Small strokes provide high reliability. Hence, we recommend using indication of pressing (for example, by sound or LED signal).

Control Panel by (membrane keypad supplier):

  • Dot LED indication.
  • Moreover, active key illumination.
  • Electroluminescent lighting.

Integration into Membrane Keypads

  1. The backlight panel is placed between the front foil and the electrical part of the keypad. At the same time, the thickness of the keypad increases by only 0.2 mm. Furthermore, other dimensions remain unchanged.
  2. The power supply to the panel carries out through a separate flexible ultra-flat cable.
  3. The glow color of the keypad by membrane keypad supplier elements is determined by the glow color of the phosphor and light filters applied to the front film. To organize a backlight containing several colors, a white glow phosphor is common in combination with color filters.

Membrane keypads, in turn, are subdivided into the following subspecies:

Rubber membrane

The most common type of membrane keypad and, perhaps, the most common type of keypads in general. The pushbutton stem locates in a special shaft, which gives direction and protects the stem from skewing when pressed.

The disadvantages of such keypads are quite typical for membrane structures: rapid wear of the membrane and pressing the key all the way, which creates unnecessary noise.

Rubber membrane scissor type

 Membrane keypad, in which the role of rod guides play by a “scissor” mechanism – crossed plates connect on a movable hinge. Thanks to membrane keypad supplier, the thickness of the device significantly reduces. The problems remained the same – the low resource of the elastic membrane. It is common in laptops due to its small size.


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