At present, it appears that the change may make it easier for Apple to perform maintenance in-store, and may cut down on total replacements of the upper case, which includes the speakers, the keyboard, the battery, and the case metal. The overall design of the key, the butterfly mechanism, and the contacts are the same. By switching to nylon, which does have a higher propensity for static, dust may not stick in-place as easily as before.īut, the clearances between materials are the same. In speaking to material scientists, and other hardware engineers, we suspect that the tackiness of the silicone in the 2018 keyboard may cause debris to stick in place, similar to how pocket lint adheres to the outside of an iPhone case made out of similar material. The updated switch design has a more translucent membrane, with a material shift to a form of nylon. In all previous generations, this material was semi-opaque and had the soft, tacky feel of silicone. Secondly, there's the gasket that sits within the switch and focuses the pressure from a keypress centrally onto the dome switch. 2018 key membrane (left) & 2019 key membrane (right)
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