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Inverted Mesa and High
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RoHS Substances

XECO inverted mesa blanks and plated blanks are inherently RoHS compliant. XECO products use cultured high quality pure quartz which is nearly 100% SiO2.  The determined levels of content of RoHS Directive listed substances and other elements tested for quartz are as follows: 

Substance

Symbol

Tested Results (ppm)

Lead

Pb

<1

Mercury

Hg

<1

Cadmium

Cd

<1

Hexavalent chromium

Cr6+

<1

polybrominated biphenyls (PBB)

PBB

<1

polybrominated diphenyl ethers (PBDE)

PBDE

<1

Iron

Fe

<1

Aluminum

Al

<5

Calcium

Ca

<1

Lithium

Li

<5

Sodium

Na

<10

Potassium

K

<5

Titanium

Ti

<1

Magnesium

Mg

<1

Manganese

Mn

<1

Copper

Cu

<1

This tables below define the maximum substance content of for XECO blanks.  RoHS substances are not detectable in quartz and XECO does not use any RoHS substance in production.  Hexavalent Chromium is an RoHS substance, however the chromium listed below is not an RoHS listed substance as it is not Hexavalent-Chromium.

 

Metal Maximums are calculated using 50% coverage of each side.  Actual may be lower and determined by each unique pattern  Actual maximum for each design can be determined by determining percent coverage and recalculating

 

Gold Plated Crystal Blanks

Gold plated Crystals Blank Area

Material Maximums
Type mm2 SiO2 (mg) Cr (ug) Au (ug)
CM200 20.268 5.904 7.023 70.411
CM220 24.525 7.144 8.498 85.200
Rx098 4.552 1.326 1.577 15.814
Rx126 5.853 1.705 2.028 20.333
Rx138 6.410 1.867 2.221 22.268
Rx150 9.677 2.819 3.353 33.618
Rx196 12.392 3.610 4.294 43.050
SM141 12.826 3.736 4.444 44.558
SM156 15.701 4.573 5.440 54.545
Maximums derived from: SiO2 Cr  Au
Max Thickness (um) = 110 0.001 0.180
Material Density gm/cm3 = 2.648 6.930 19.300
max ug/mm2 = 291.280 0.347 3.474

100% Aluminum plated Crystal Blanks

Aluminum plated Crystals Blank Area

Material Maximums 
Type mm2 SiO2 (mg) Al (ug)
CM200 20.268 5.904 27.362
CM220 24.525 7.144 33.109
Rx098 4.552 1.326 6.145
Rx126 5.853 1.705 7.902
Rx138 6.410 1.867 8.654
Rx150 9.677 2.819 13.064
Rx196 12.392 3.610 16.729
SM141 12.826 3.736 17.315
SM156 15.701 4.573 21.196

Maximums derived from:

 SiO2 Al

Max Thickness (um) =

 110 0.500

Material Density gm/cm3 =

 2.648 2.700

max ug/mm2 =

 291.280 1.350

Crystal Blanks

Blank only Blank Area Material Maximum
Type mm2 SiO2 (mg)
CM200 20.268 5.904
CM220 24.525 7.144
Rx098 4.552 1.326
Rx126 5.853 1.705
Rx138 6.410 1.867
Rx150 9.677 2.819
Rx196 12.392 3.610
SM141 12.826 3.736
SM156 15.701 4.573
Maximums derived from: SiO2
Max Thickness (um) = 110
Material Density gm/cm3 = 2.648
max ug/mm2 = 291.280
 

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Copyright 2004-2008 XECO Inc. XECO independent manufacturer of inverted mesa crystal blanks and high frequency blanks for oscillator, filter, and sensor applications. High frequency blanks and high frequency plated crystal blanks supplier.  XECO inverted mesa crystal blanks and high frequency blanks are supplied as plated blanks as well.