Liquidmetal Technologies Inc (LQMT)

[joshuaeyu]

lock washer is a "short" spring

steel lock washer typically is a "one time" spring due to lack of "elasticity"

BMG has elasticity (return of form) of 1.6%. Check out the BMG money clip.

BMG lock washer hence can replace spring with much tighter gap space.

Spring typically has limited lifetime compress/decompress. This is why home button was the weak link in iphone for reliablity.

BMG can provide lifetime compress/decompress and this is why Apple consider BMG for home button.

Same argument can be made for foldable as hinge must handle life time flip flop.