How strong is the MacBook Pro touchpad?
Dear friends I would like to ask about the strength of macbook pro 2021 trackpad...
As I noticed in the video below, the glass layer on the top and the sensor layer (black) of the magic trackpad2 are attached each other with a special capasitive glue/adhesive. Is this technique same on all touchpads in macbook pros including 2021 models?
If a person press the finger with pressure and moves the finger horizontaly (ex:left to right), is it possible to seperate or damage these layers and effect the sensitivity of sensor layer?
Thanks for replies.
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@emh06 sounds like you are concerned about the shear capacity of glass to metal joints. The way the glass is adhered to the trackpad, it would function as a asymmetric compressive lap joint. There is some really good information about this on here https://core.ac.uk/download/pdf/77011021... Slightly dry reading. The testing your could do would be something for an adhesive lap joint shear test Ultimately you would need to find a ASTM D1002 test report on this and not sure if that has ever been done.
Thanks for detailed explanation, i absolutely mean the shear capacity @oldturkey03
Thanks Alisha, your reply is very useful for me. At this point may i ask a last question. Does the Apple use same attach technique (adhesive for glass and sensor layer) on all MacBook Pros. I have asked this because as i noticed, every touchpad in teardown videos have different phenotype. But if Apple use adhesives for magic trackpad 2 as seen on video, we can assume the same for MacBook Pro 2021
emraha06 - A desktop touchpad is a very different animal to a laptop touchpad. On the most part its more exposed to things being dropped on it and or having it fall to the floor being pushed aside.
A laptop trackpad is less exposed when the lid is down its protected (but now the display is at risk if the object has enough mass and speed). More often a liquid spill doom's the trackpad and/or the keyboard.
So to equate the two as equals is not fair. The adhesion of the glass surface is really not an issue I have yet to see either a desktop or laptop trackpad come unglued. And of course being careful also matters so it is not smashed!
A persons finger sliding across the surface does not have enough friction to displace the sheer force of the adhesion. Besides it needs space to slide to.
Here a laptop trackpad is captured by a lip so it can't shift so even if you where to adhere a sizable block on the trackpad and then attempted to shift it (slide) with all of your might left-right or up-down it just won't budge!
Now grasping the top edge of that block and tilting it you would likely pull the glass off or distort the frame like using a pull-up tab on a can of beans! But that is not the force direction you would have in use. And you would likely crack the glass as well.