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Molybdenum Bolts For Semiconductor Devices Materials
1. Materials For Molybdenum Bolts Used in Semiconductor Devices :
Molybdenum bolt is a semiconductor device material. It is a nut-and-threaded cylindrical fastener. It is processed with a high-temperature molybdenum rod and has stable physical properties at 1800 °C.
The product types are M2 (the outer diameter of the screw is 2mm) ~ M32 (the outer diameter of the screw is 32mm) * L (length), generally produced according to the user's drawings Bolts, slotted molybdenum bolts, T-shaped molybdenum bolts, special-shaped molybdenum bolts and other specifications.
High-temperature molybdenum rods, which are created and processed by lathes, are used to make molybdenum bolts. When using wire picking on lathes larger than M12, producers should utilize correct operation techniques and tools, as well as be familiar with the properties of molybdenum metal materials. Rotten teeth will result from improper operation, and the workpiece will need to be discarded. The minimum molybdenum bolt can be M1.6*L, and some manufacturers design the molybdenum bolt as a special-shaped part for the convenience of use.
2. Size Of Molybdenum Bolts For Semiconductor Devices Material:
Below is some size of Mo bolts thread pitch:
| Spec. | Thread pitch (mm) | Spec. | Number of threads
| |||
| Coarse pitch | Fine pitch | Very fine pitch | Coarse number | Fine number | ||
| M3 | 0.5 | 0.35 | 4# | 40 | 48 | |
| M4 | 0.7 | 0.5 | 6# | 32 | 40 | |
| M5 | 0.8 | 0.5 | 8# | 32 | 36 | |
| M6 | 1.0 | 0.75 | 10# | 24 | 32 | |
| M7 | 1.0 | 0.75 | 12# | 24 | 28 | |
| M8 | 1.25 | 1.0 | 0.75 | 1/4 | 20 | 28 |
| M10 | 1.5 | 1.25 | 1.0 | 4/16 | 18 | 24 |
| M12 | 1.75 | 1.5 | 1.25 | 3/8 | 16 | 24 |
| M14 | 2.0 | 1.5 | 1.0 | 7/16 | 14 | 20 |
3. Standard Of Molybdenum Bolts For Semiconductor Devices Material:
| Item No. | DIN-Stabdard | Desciption in English | ISO-Standard | GB-Standard |
| 1 | DIN 1 | Taper pins | ISO2339 | GB117 |
| 2 | DIN7 | Parallel pins | ISO2339 | GB119-86 |
| 3 | DIN84 | Slotted cheese head screw | ISO1207 | GB65-85 |
| 4 | DIN125-A | Plain washers | ISO7089 | GB97.1-85 |
| 5 | DIN125-B | Medium washers | ISO7090 | GB97.2-85 |
| 6 | DIN126 | Plain washers | ISO7091 | |
| 7 | DIN558 | Hexagon screws | ISO4018 | |
| 8 | DIN601 | Hexagon blots | ISO4016 | |
| 9 | DIN923 | Slotted pan head screw with shoulder | GB830-88 | |
| 10 | DIN931 | Hexagon head screws | ISO4014 | GB5782-86 |
| 11 | DIN933 | Hexagon head screws | ISO4017 | GB5783-86 |
| 12 | DIN934 | Hexagon full nuts | ISO4032 | GB6170-86 |
| 13 | DIN935 | Slotted hexagons and castle nuts | ISO7035 | GB6178-86 |
| 14 | DIN7972 | Countersunk flat head tapping screws with slot | ISO1482 | GB5283-85 |
| Etc. | ||||
4. Application Of Molybdenum Bolts For Semiconductor Devices Material:
Molybdenum bolts are be widely used in fixing high temperature resistant mechanical parts, sintering furnace fasteners, etc. Molybdenum screws are frequently used in glass ceramics, vacuum furnaces, single crystal furnaces, LED furnaces, and other equipment in everyday life.
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