Claughton Miller & Associates provide high quality diamond based slurries, diamond powders, and colloidal silica slurries suitable for several applications within disk drive manufacturing processes. CMA also provides alumina based lapping films and tapes engineered for use in the burnishing process of hard disk drive media disks.
Diamond Based Slurries:
- Control over production process from diamond powder production
through slurry bottling
- Various diamond types and sizes available
- Various pH and solids weight % available
- Suitable for Al and glass disk processes
- Suitable for production process of perpendicular and longitudinal media
Diamond Powders
| Type |
Particle Size Range (µm) |
| Mono-crystalline diamond |
0.05-50 |
| Poly-crystalline diamond |
0.05-6.0 |
| Nano-diamond |
0.01-0.1 |
| Fine cerium oxide powder |
0.1-3 |
Poly-crystalline diamond powder: PCD
High purity mono-crystalline diamond powder: HPD
Nano-diamond powder: NMD
| Size (µm) |
PCD |
HPD |
NMD |
| 0.04 |
N |
N |
Y |
| 0.06 |
N |
N |
Y |
| 0.10 |
Y |
Y |
Y |
| 0.12 |
Y |
Y |
Y |
| 0.15 |
Y |
Y |
N |
| 0.20 |
Y |
Y |
N |
| 0.30 |
Y |
Y |
N |
| 0.50 |
Y |
Y |
N |
| 1.00 |
Y |
Y |
N |
| 1.50 |
Y |
Y |
N |
| 2.00 |
Y |
Y |
N |
| 3.00 |
Y |
Y |
N |
| 6.00 |
Y |
Y |
N |
| 9.00 |
Y |
Y |
N |
Diamond Powders Typical Properties
| Item |
Nanometer diamond |
Poly-crystalline diamond |
| Appearance |
Grey powder |
Black powder |
| Shape |
Rounded shape |
Rounded shape |
| Crystalline |
Mono-crystal |
Poly-crystalline |
| Particle size (um) |
Median 0.008,
range 0.001-0.03 |
0-0.125, 0-0.25, 0-0.5, 0-1,
0-2, 1-2, 2-4 |
| Density (g/m3) |
3.50-3.51 |
3.35-3.49 |
High Purity Colloidal Silica Slurries:
- Made from high purity silicon powder
- Designed for low sodium content
- Low metal content
- Generates angstrom level finish of polished surface
- Suitable for polishing process of semiconductor wafers, hard disk drive substrates and media disks, fiber optic connectors, etc
Colloidal Silica Slurries Typical Properties
| Item |
Alkaline slurry |
Acidic slurry |
| Particle size (nm) |
20-40; 40-60; 60-80; 100-140 |
15-35 |
| Appearance |
Milky white liquid |
Milky white liquid |
| Density (g/ml) |
1.15 |
1.15 |
| pH |
9.8±0.5 |
2-3 |
Alumina Lapping Films
| Mesh |
Size (µm) |
Color |
| 15000 |
0.3 |
 |
| 10000 |
0.5 |
 |
| 8000 |
1.0 |
 |
| 6000 |
2.0 |
 |
| 4000 |
3.0 |
  |
| 3000 |
5.0 |
 |
| 2000 |
9.0 |
 |
| 1500 |
12.0 |
 |
| 1200 |
15.0 |
 |
| 600 |
30.0 |
 |
| 400 |
40.0 |
 |
|
