microchip vs semiconductor unit

microchip and semiconductor unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
microchip	Yes	No	No	No
semiconductor unit	Yes	No	No	No

As nouns, semiconductor unit is a hypernym of microchip; that is, semiconductor unit is a word with a broader meaning than microchip:

microchip: electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit
semiconductor unit: a conductor made with semiconducting material

Other hypernyms of microchip include semiconductor, semiconductor device.

microchip (noun)	semiconductor unit (noun)
electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit	a conductor made with semiconducting material