Quartz blanks and wafers

Blanks
	Material	Q value	Etch channel density	Blank surface finish
	Pure Z-zone of Quartz crystal	Typical above 1.8 x 106, on request 2.4 x 106	Typically max. 100cm², on request max. 30cm²	# 1000, # 2000, # 3000, # 4000 and polished Interference light band: max. 2 interference light band in the 80% of the blank central part
Blank form	Shape / finish	Cut family	Thickness	Blank size
Square Wafers	Lapped to frequency or thickness Plan-Plan lapped (3 or 1µm Al2O3) Plan-Plan lapped and etched Plan-Plan polished	AT, IT, SC, AC Other upon request	0.06 – 1.20mm	AT-Cut: max. 20x20 mm IT/SC-Cut: max. 31x31 mm
Round Blanks with or without flat, acc. to request: i.e. position, size and number of flats	Bevelled blanks (eventually etched) Biconvex-barelled (eventually etched) Planconvex (lenses) (eventually etched) Plan-Plan lapped (3 or 1µm Al2O3) Plan-Plan lapped and etched Plan-Plan polished Contoured blanks (eventually etched)	AT, IT, SC, AC Other upon request	0.05 – 1.20mm	AT-Blanks from shelf: ⌀ = 4.7 mm, flat = 0.4 mm ⌀ = 5.6 mm, flat = 0.4 mm ⌀ = 5.8 mm, flat = 0.6 mm ⌀ = 8.0 mm, flat = 0.5 mm On request any Ø and flat SC-Blanks: Max. ⌀ 16 mm With any flat size

Max. achievable cut angle accuracy:
AT-Cut: Phi = 10min, Theta = 15sec
IT & SC-Cut: Phi = 1min, Theta = 5sec
AC-Cut: Phi = 10min, Theta = 20sec
Y+5°: Phi = 10min, Theta = 30sec

Typical ranges of delivered cut angles of the blanks:
AT-Cut: Phi = ±15min, Theta = ±1min
IT & SC-Cut: Phi = ±2min, ±5min and ±8min,
Theta = above ±15sec
AC-Cut: Phi = ±15min, Theta = ±2min
Y+5°: Phi = ±15min, Theta = ±3min

Blanks produced by Delipro s.r.o.