New? Using epoxy to make batteries hard to replace and other tweaks to make other unreliable parts hard to replace. Popular recent choices are keyboards and backlights.
However the popular "ultra" books and similar have to integrate more heavily to get close to 1". Even fans become hard to replace. Often there's no dimms (so you can't replace or add ram), even storage can be on the motherboard.
They are close to disposable unfortunately.
is it a consumer grade or corporate model?