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Wafer Grinder
Flat Lapping and Polishing
D.S. Lapping and Polishing
Buffing Polishing
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Samples Made by Wafer Grinder

Sample
Thumbnail

Major
Material

Dimension
(inch)

Applied
Machining

Thickness
(μm)

TTV
(μm)

Roughness
(Sa/nm)

Flatness
(μm)

Silicon
Carbide

6

Coarse Grinding
Fine Grinding

120

2.472

2.404

1.518

Silicon
Carbide

6

Coarse Grinding
Fine Grinding
CMP

 150

2.643

0.745

1.343

Gallium
Nitride

4

Coarse Grinding
Fine Grinding
CMP

300

2.181

1.163

1.089

Germanium

4

Coarse Grinding
Fine Grinding
CMP

145

2.205

0.856

1.273

Sapphire

4

Coarse Grinding
Fine Grinding
CMP

220

2.315

0.933

1.148

Gallium
Arsenide

4

Coarse Grinding
Fine Grinding

60

2.240

8.065

1.928

Silicon

12

Coarse Grinding
Fine Grinding

75

2.782

10.065

1.455

Piezoelectric
Ceramic

2

Coarse Grinding

50

1.651

32.468

0.843

Solar Wafer

8.839

Coarse Grinding

100

3.188

13.427

2.212

Samples Made by Flat Lapping and Polishing

Sample
Thumbnail

Sample
Application

Major
Material

Dimension
(mm)

Applied
Machining

Flatness
(μm)

Parallelism
(mm)

Roughness
(Sa/nm)

Valve Plate

Coated
Copper

Φ140×8

Lapping

1.974

0.021

Not Specified

CNC Bits

Tungsten
Carbide-cobalt

Various Size

Lapping

1.243

Not Specified

Not Specified

Slide Sealing
Block

SUS 304

36×6×5.5

Lapping
Polishing
*convex

1.695

Not Specified

8.662

IC Package
Substrate

Gold Plating
and Resin

240×96×2.35

Grinding
Lapping
*removal

3.493

0.046

Not Specified

Pump Plate

6065
Aluminum

Φ36.6×7.95

Lapping

1.562

Not Specified

Not Specified

Solar
Collector

Glass

120×120×4

Lapping
Polishing

2.315

0.034

12.748

Aero Engine
Casings

Special
Titanium
Alloy

Φ862×522

Lapping

7.5

Not Specified

Not Specified

Large
Holographic
Slide

Glass

Lapping
Polishing

Φ685×22

10.3

0.05

5.466

Samples Made by Double Sided Lapping and Polishing

Sample
Thumbnail

Sample
Application

Major
Material

Dimension
(mm)

Applied
Machining

Flatness
(μm)

Parallelism
(mm)

TTV
(μm)

Roughness
(Sa/nm)

Sealing
Ring

Ceramic
Al2O3

Φ82×5.5

Lapping

1.487

1.653

4.841

Not Specified

Automotive
Component

SUS 304

Φ80×4.75

Lapping
Polishing

2.347

2.815

5.642

16.374

Pump Plate

SUS 316

Φ232×47

Lapping

1.775

2.656

4.147

Not Specified

Valve Plate

SUS 304
and Cooper

Φ173×8

Lapping

2.886

3.132

8.667

Not Specified

Valve Pad

Epoxy
Resin

Φ260×0.77

Lapping

2.835

2.989

Not Specified

Not Specified

Pump
Hatch

Carbide
Metal

Φ103×4.05

Lapping

1.823

2.138

 1.985

Not Specified

Fingerprint
Film

Ceramic
ZrO2

Φ52×0.8

Lapping
Polishing

1.583

1.973

2.112

4.349

Gauge
Block

7075
Aluminum

33×18×6

Lapping
Polishing

0.313

0.524

0.749

12.845

Samples Made by Screen Buffing

Sample
Thumbnail

Sample
Application

Major
Material

Applied
Machining

Edge Circle
(Quarter/Half)

Roughness
(Sa/nm)

Orange Peel
Effect

Defect Dia.
(μm)

Back Plate

Aluminum
Alloy

Buffing

Half Circle

14.915

1%

≤ 0.1

Back Plate

Zirconia

Buffing
Polishing

Half Circle

11.876

1%

≤ 0.1

Back Plate

Zirconia

Buffing

Quarter Circle

18.266

2%

≤ 0.1

Touch Screen
Assembly

GFF Glass

Buffing

Quarter Circle

15.134

0.5%

≤ 0.1

Outter Screen

GFF Glass

Buffing
Polishing

Quarter Circle

17.485

0.5%

≤ 0.1

Outter Screen

PMMA

Buffing

Quarter Circle

12.279

Not Allowed

≤ 0.1

Smart Phone
Middle Frame

Aluminum
Alloy

Lapping
Buffing
Polishing

Quarter Circle
*corner

42.610

Not Specified

Not Specified

Smart Watch
Middle Frame

Aluminum
Alloy

Corase Buffing

Half Circle

251.651

Not Specified

Not Specified