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Crystals Grown for technical applications
 
The technical specification for crystals of piezo quartz Y-bar “As grown”

Mark YB- 1 (YB-2, YB-3), if customer requires.

 

1)Handedness - right-handed (RH).

2) Q - value
                                                                                

Grade
 Qx106, min
 a 3500, max

B

C

D

2.4

1.8

1.4

.045

.060

.080

 

3) Inclusions density  - as per IEC 60758(1993).

Grade according

to inclusions

density

 

Quantity of inclusions according to dimensions ,   pcs/cm2

<30 mm

30-70mm

70-100mm

>100mm

I

6

4

2

2

II

9

5

4

3

III

12

8

6

4

IV

are not standardized

4) Dimensions of crystals along axes

 

Mark YB-1

Mark YB 2

Mark YB-3

 

Z, mm

19-23

23-26

26-32

 

X, mm

15-18

17-21

17-24

 

Y, mm

197-203

197-203

197-203

 

 

5)Seed

- dimensions, mm

along X-axis……………………………………………………………..3.5

along Z axis………………………………………………………..……..2.5 max.

- orientation:

angle of  Z- surface  of the seed to  direction of Х,Y axes       ……0°00’ + /-30’

angle of X-surface of the seed to the direction of Y-axis………….0°00’ + /-10’

 

6) External view:

 The Z- zone of crystals should have no twins, punctures, cracks in usable length –Yeff.

 

If customer desires, lumbered Y-bars can be produced from Y-bars

“As grown” with the required dimensions.

 

 

The technical specification for as-grown one-side blocks

Mark 1.20 ( 1.25; 1.30)

 

1)Handedness        - right-handed (RH).                      

2) Q - value           

Grade

Qx106, min

a 3500, max

A

2.8

 

B

2.4

.045

C

1.8

.060

 

3) Inclusions density    -  as per IEC  60758.

 

 Grade

Quantity of inclusions according to dimensions ,   pcs/cm2

<30 mm

 30 - 70 mm

   70 - 100 mm

  >100 mm

I-a

2

1

0

0

I-b

3

2

1

1

 

4) Etch channel density --  as per IEC  60758.

   Grade

    ECD, pcs/ cm2

            1

             < 10

            2

             <30

            3

             <100

 

5) Dimensions of crystals along axes

 

Y, mm

200-210

200-210

200-210

 

 

Mark 1.20

Mark 1.25

Mark 1.30

 

Z, mm

>23

>28

>33

 

X, mm

76-92

>80

>90

6)Seed

dimensions, mm:

along Х axis ……………………………………… ………………a) 67 - 72,   b) 76-80  

along Z axis…………………………………………………………………….2,0 max.

orientation:                     

angle of  XY- surface of the seed to  direction of X,Y axes…………..= 0°00’ + /-30’.

 

 

The technical specification for quartz crystals of lumbered bars

 Mark  10x20x200 (XxZxY)

1)Handedness        - right-handed (RH).                      

2) Q - value                                                         

Grade

Qx106, min

a 3500, max

A

2.8

 

B

2.4

.045

C

1.8

.060


3) Inclusions density    - as per IEC 60758 (1993).

 

 Grade

Quantity of inclusions according to dimensions ,   pcs/cm2

<30 mm

 30 - 70 mm

   70 - 100 mm

  >100 mm

I-b

3

2

1

1

I

6

4

2

2

II

9

5

4

3

III

12

8

6

4

 

4) Etch channel density - as per IEC 60758 (1993).

 

   Grade

    ECD, pcs/ cm2

            1

             < 10

            2

             <30

            3

             <100

            4

             <300

            5

            < 600

5)  Dimensions of lumbered bars along axes

Z, mm

(+/-0,2mm)

20

18

X, mm

(+/-0,1mm)

10

9

Y, mm

 

200-220

200-220

Other dimensions apply according to customer’s request.

 

6) Orientation of surface of lumbered bars

Angle of +X /- X surface to direction of Y- axis and Z-axis …………….. 0 00’+/- 15’

Angle of Z-surface to direction  of    Y- axis……………………………… 0 00’+/- 30’

Angle of Z-surface to direction of      X- axis………………………………0 00’+/- 15’

7)Seed dimensions, mm:

- along X-axis…………………………………………………………………10.0 +/- 0.1

- along Z –axis……………………………………………………………………2.0  max

- along Y –axis……………………………………………………………………200-220

Orientation

Angle Y’-axis to Y-axis …………………………………………………….…0 00’+/-30’

Centrality

The seed should be contained within the central area between Z-surfaces.

The width of the area should be less than 3.0 mm.

8) Roughness of the lumbered surface:

Diamond wheel No.80 or better, or according to customer’s request

 

The technical specification for quartz  crystals of lumbered Z-blocks

Mark 2.10  ( 2.15, 2.20, if customer requires)

 

1)Handedness  - right-handed (RH).                      

2) Q - value           

Grade

Qx106, min

a 3500, max

A

2.8

 

B

2.4

.045

C

1.8

.060

 

3) Inclusions density    - as per IEC 60758 (1993).

 

 Grade

Quantity of inclusions according to dimensions ,   pcs/cm2

<30 mm

 30 - 70 mm

   70 - 100 mm

  >100 mm

I-b

3

2

1