Introduction

The high quality EM-Tec TEM support grids are designed as sturdy and stable support grids. They are available in a variety of materials to suit the application at hand. The materials are the standard copper, nickel, gold and molybdenum and additionally titanium, aluminium and stainless steel. There are two manufacturing processes used for the EM-Tec TEM support grids:

• Electro forming processes for copper, nickel and gold TEM grids for well defined features and consistent quality with an average thickness of 25um.
• Electro etching processes for molybdenum, aluminium, titanium and stainless steel foils with a thickness of 25um, except titanium which is 15um and stainless steel which is 12um.

After manufacturing they undergo a proprietary cleaning process to reduce contamination issues. All EM-Tec TEM grids are inspected for 100% quality assurance. The thickness of the EM-Tec TEM grids results in a more rigid and stable TEM grid for specimen support and specimen support films. The 375um wide rim contributes to a greater stiffness and makes handling and transportation of the grids much easier than grids with a narrower rim. The EM-Tec high quality TEM support grids are packaged in anti-static plastic vials with vials of 100 grids for Cu and Ni. The EM-Tec grids made from Au, Mo, Al, Ti and stainless steel are packaged in vials of 25 grids. They all have the standard 3.05mm diameter. Available patterns are:

EM-Tec finder TEM support grids, 200 mesh-R2

• Square Mesh grids with a center mark in 50-600 Mesh, specifications
• Hexagonal Mesh grids with a center marker in 90 – 360 Mesh, specifications
• Slotted or rectangular Mesh with a center mark in 50/200, 75/300 and 100/400 Mesh, specifications
• Folding, double or oyster grids with a center mark in 50/50 – 100/400 Mesh, specifications
• Aperture grids with holes from 0.4 – 2.0 mm, specifications
• Singel slot grids with slots from 0.2 x 0.5mm to 0.98 x 2.0mm, specifications
• Finder grids (also called locator of reference grids) with reference patterns

Mesh

Pitch

µm

Hole

µm

Bar

µm

Transmission

%

Rim width

µm

Thickness*

µm

Tolerance

± µm

Diameter

mm

50

508

425

83

70

375

25

5

3.05

75

339

284

55

70

375

25

5

3.05

100

254

204

50

65

375

25

5

3.05

150

169

125

44

55

375

25

5

3.05

200

127

90

37

50

375

25

5

3.05

300

85

54

31

40

375

25

5

3.05

400

64

38

26

35

375

25

5

3.05

500

51

28

23

30

375

25

5

3.05

600

41

26

15

42

375

25

5

3.05

Mesh

Pitch

µm

Hole

µm

Bar

µm

Transmission

%

Rim width

µm

Thickness*

µm

Tolerance

± µm

Diameter

mm

90

272x317

224x269

48

70

375

25

5

3.05

135

186x208

148x172

36

65

375

25

5

3.05

180

139x157

11x129

28

65

375

25

5

3.05

270

86x99

62x75

24

55

375

25

5

3.05

360

67x79

41x51

26

40

375

25

5

3.05

Mesh

Pitch

µm

Hole

µm

Bar

µm

Transmission

%

Rim width

µm

Thickness*

µm

Tolerance

± µm

Diameter

mm

50x200

508x127

425x87

40

62

375

25

5

3.05

75x300

340x85

285x55

30

62

375

25

5

3.05

75x300
Staggered

339x85

284x55

30

55

375

25

5

3.05

100x400

254x64

231x40

23

57

375

25

5

3.05

Mesh

Pitch

µm

Hole

µm

Bar

µm

Transmission

%

Rim width

µm

Thickness*

µm

Tolerance

± µm

Diameter

mm

50/50

508/508

425/425

83/83

70/70

375

2 x 25

5

3.05

100/100

254/254

205/205

49/49

65/65

375

2x 25

5

3.05

100/200

254/127

205/90

49/37

65/50

375

2 x 25

5

3.05

100/300

254/85

205/57

49/28

65/45

375

2 x 25

5

3.05

100/400

254/64

205/38

49/26

65/35

375

2 x 25

5

3.05

200/200
Reference

127/127

112/108

15/19

78/72

275

2 x 25

2

3.05

Aperture

µm

Tolerance

± µm

Thickness*

µm

Diameter

mm

400

20

25

3.05

600

20

25

3.05

800

20

25

3.05

1000

20

25

3.05

1500

20

25

3.05

2000

20

25

3.05

Slot

Width

µm

length

µm

Tolerance

± µm

Thickness*

µm

Diameter

mm

205

200

500

10

25

3.05

215

339

284

10

25

3.05

420

420

2000

20

25

3.05

1020

980

2000

20

25

3.05