crwdns2936039:0iPhone 4 Gyroscope Teardowncrwdnd2936039:05crwdne2936039:0

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crwdns2933797:0Andrew Bookholtcrwdnd2933797:0Kho 28, 2010crwdne2933797:0

	[* icon_note] The chips in the steps below are not part of the iPhone 4, but are included to illustrate the incredible structures of MEMS gyroscopes.
	[* black] Shown in these photos is the ST LYPR540AH Tri-axis MEMS gyroscope, shot by a scanning electron microscope ([link\|http://en.wikipedia.org/wiki/Scanning_electron_microscope\|SEM]).
	[* black] MEMS devices require extremely complicated and sensitive [link\|http://en.wikipedia.org/wiki/Microelectromechanical_systems#MEMS_manufacturing_technologies\|manufacturing procedures] to produce the kind of accuracy needed for reliable sensors.
-	[* black] Most MEMS devices require a combination of deposition of a film layer, patterning to mask off areas of the deposited film to remain after etching, and etching to remove excess ~~metallic~~ film to achieve the final product.
+	[* black] Most MEMS devices require a combination of deposition of a film layer, patterning to mask off areas of the deposited film to remain after etching, and etching to remove excess film to achieve the final product.