In addition to the metal dome, the color of the PET glue in the metal dome array has also become a focus of some customers. The PET glues we often use include white, transparent and black, among which white and transparent PET are widely used. However, the actual application still needs to be selected based on the needs of the customer and understand the metal dome array PET. There will also be some customers who will ask some professional questions, and I will explain them here. Why does the Dome array PET tape lift up during use? In fact, PET is glued to the PCB, and the metal dome array should be flat under normal circumstances. After being used for a period of time, the outline of the dome array may tilt, causing dust to enter the PET, causing undesirable phenomena. So what is the reason for this? When the dome array has a double-layer structure, the thickness of the upper polyester film is about 0.05mm, and the thickness of the lower spacer layer is about 0.075mm. If the metal dome is a high-height series, such as a triangular metal dome or a metal dome with legs (height: 0.4-0.7mm), due to the height of the metal dome, the space between the metal dome and the gasket will be too large. Therefore, when the metal dome is close to the outline during use, the dome array in this area will tilt upward. We provide customers with two solution suggestions: The first is to keep the distance between the dome and the contour from being too close based on the actual application, leaving enough space to prevent tilting during use. Alternatively, you can make the shim thicker and add more adhesive to prevent the dome from tilting upward. What are the benefits of making the dome into a dome array? The metal dome is a small dome in production. A layer of PET tape needs to be attached to the production dome array. First of all, it can prevent dust and contamination from entering, and it can also make the dome more firmly attached to the circuit board. https://www.metal-domes.com/blog/2023/10/17/answers-to-common-metal-dome-questions/

Analysis of the use of metal domes in silicone rubber keyboards The metal dome used on the silicone membrane keyboard is mainly located on the conductive part of the PCB (mostly above the gold fingers on the circuit board). While the metal dome is mainly made of stainless steel, the metal dome plays an important role in the tactile switch and also has conductive properties. When the silicone rubber keypad is pressed, the center point of the metal dome is concave and contacts the circuit on the PCB to form a loop. The metal dome is reflowed to make the silicone rubber keyboard work. The metal dome array consists of individual metal domes on a pressure sensitive bonded PET sheet, each individual metal dome occupying a designated position on the dome display. This kind of position is after the supplier provides the drawing and confirms with the engineer, advanced proofing, and then starts mass production to ensure the availability of the product and reduce the error rate of the product. At the same time, a detachable anti-adhesive backing is arranged on the metal dome display, which allows customers to use it more efficiently. Silicone rubber keyboard in use, the dome display provides a new tactile experience, due to the different design, the metal dome provides users with a unique and satisfying keystroke response when pressed, improving the user’s comfort during use sex. The metal dome is an inseparable component in work and life, it connects the command transmission between us and the machine. There is a metal dome added to the silicone rubber keyboard, which makes the transmission command fast, accurate and efficient. From modern consumer electronics to industrial mechanical interfaces, the sophistication and reliability of metal domes has evolved little by little. https://www.metal-domes.com/blog/2023/09/01/analysis-of-the-use-of-metal-domes-in-silicone-rubber-keyboards/