Unit 9 Semiconductors of n-Type and p-Type Language work

(I) If-clause(If I install …, it will result … )

If	+	Present Simple		+	Future Simple
		I/we/you/they	add/form/leave		I/we/you/they he/she/it	will	except/attempt/require
		he/she/it	adds/forms/leaves

or

Future Simple			+	if	+	Present Simple
I/we/you/they he/she/it	will	except/attempt/require				I/we/you/they	add/form/leave
						he/she/it	adds/forms/leaves

For example:

• If we add a small amount of arsenic to silicon, several valence electrons of each arsenic atom will form covalent bonds with the neighbouring atoms of silicon.

• If gallium is introduced into a silicon crystal, each gallium atom will attempt to form a covalent bond with each of its four neighbouring silicon atoms.

1. Fill in the table

Noun	Verb	Adjective	Adverb	Translation	Transcription
acceptor	accept	acceptor (impurity)	-	принимать, признавать, акцептор, акцепторная примесь
attempt				попытка
	calculate
conclusion				заключение
	condense
		continuous		непрерывный
	install			устанавливать
			loosely	свободно
majority/ majority charge carriers				большинство/ основные носители заряда
minority/minority charge carriers				меньшинство/ неосновные носители заряда
	progress
	require			требовать

2. Put the verbs in brackets into the correct form.

1. What … (occur) if holes and electrons … (meet) in the semiconductor?

2. We … (get) an N-type semiconductor, if we … (add) arsenic to silicon.

3. If gallium … (introduce) into a silicon crystal, it … (result) into a P-type semiconductor.

4. If the electron … (have no) pair, it easily … (free) itself.

5. A semiconductor … (call) as N-type semiconductor, if the holes … (be) the minority charge carriers.

6. If the thermal agitation … (apply) to the silicon crystal, we … (have) the holes, moving in the same way as the holes introduced by atoms of gallium.