There is flash memory in SSD, what is there in flash memory?

SSD is popular nowadays, many people have already had some comprehension for SSD products. As we all know that the data of SSD is stored in flash memory chip after being handled by host system. But few people know what is hidden in flash memory.

Flash granules in SSD

Dismantling the shell of SSD, you will find that the flash memory is plastic particles with codes. In fact, the thing in SSD is the reflection of advanced technologies and technology accumulation. what is inside, let ‘s talk layer by layer.

Plastic package is just a flash protective case

The black package is just the protective cover of flash memory. The codes on the surface can be printed only after the factory certification of flash memory manufacturer, so the codes have certain anti-counterfeiting ability. Generally speaking, there are not codes from original factory in white die and black die.

Wafer connect gold wire

Dismantling the package of flash memory, there are wafers inside. Firstly, the wafer is welded to the circuit board with gold wire. Then, it is encapsulated to become flash memory. The process is extremely fine and can only be accomplished by large precision instruments.

Single wafer size is very small

The size of single wafer is very tiny. In general, a strip of wafer with the corresponding size is cut off from the whole large wafer. The qualified wafer particles after being screened are extracted manually and automatically by machine.

Silicon wafer actually is the ontology of wafer before cutting. The silicon wafer is polished by chemical machine to make it smooth at least like a mirror and made to a mask in the lithography production process.

The dust-free control standard in the operating room is 100 times cleaner than in the hospital operating room, and the wafer has the storage function only after precision lithography.

The wafer wafer precursor is still a cylinder

Before cutting, the pie wafer is a cylindrical single crystal rod. It is cut, according to the appropriate size. Then it will be ground to remove the concave and convex to become wafer.

Ok, are there some people who want to know how to make single crystal rod?

The original material of wafer is silicon, while the main component of sand is silica. The high purity polycrystalline silicon is made by silica through electric arc furnace refining, chlorination of hydrochloric acid and distillation.

The polycrystalline silicon is melted in a quartz crucible, a seed crystal is immersed in it. And the seed crystal is revolved in the opposite direction by the drawing rod. At the same time, the seed crystal is pulled up slowly and vertically from the silicon melt. After being pulled out and cooled, it becomes a single crystal silicon rod with the same orientation as the lattice inside the seed crystal.

Therefore, we can say that flash memory is made by sand through complex procession. It needs fussy and advanced manufacturing technology to make the flash memory own the ability of storing data. However, the quality of flash memory can be divided to various kinds.

Skills of choosing SSD with 7 classic solid state disks recommended

Enterprise-class SSD P8260 launched by UNIS, the controller, 3D Flash and DRAM inside are all made by UNIS