Types of Memory Chips?
Memory made up of four types of memory chips: RAM, ROM, CMOS, and Flash. RAM stands for Random Access Memory and ROM stands for reading Only Memory. They also known as the primary storage of a computer.
How is RAM Made?
Have you ever wondered what RAM is made of and how memory is made? Here’s a behind-the-scenes look at the complicated process we go through to create memories to ensure you receive a high-quality product.
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The first step from Si to the integrated circuit is producing a cylinder or pure, monocrystalline silicon ingot with a diameter of 330 millimeters. The circuit elements of the chip (electronic transistor, resistors and capacitors) then formed in layers on the silicon wafer. Once assembled, the silicon ingots cut into thin, highly polished wafers less than six millimeters thick. Circuits developed, simulated, and refined in computer systems before they actually built.
In the sterile cleanroom environment, wafers go through a multi-step photolithography process that repeated once for each mask required by the circuit. Masks used to define the different parts of a transistor, capacitor, resistor, or connector that complete the integrated circuit and the circuit pattern for each layer in which the device manufactured.
The wafer then evenly coated with a thick, light-sensitive liquid, known as photosensitive resin. Portions of the wafer selected for exposure by carefully aligning a mask between an ultraviolet light source and the wafer. The light passes through the transparent areas of the mask and exposes the photosensitive resin.
During the etching step, wet acid or dry plasma gas applied to the wafer in order to remove the part of the nitride layer which not protected by the hardened photosensitive resin. This leaves a pattern of nitride on the pad in the exact design of the mask.
Classification Storage Technologies
Data carriers can be classified according to many functional criteria. Among these, silicon-based semiconductor memories divided into two: volatile and non-volatile In volatile memories. Information will eventually fade when the power turned off, unless the devices to store the data regularly updated. On the other hand, non-volatile memories retain the stored information even when the power turned off. Volatile memories, such as static random contact memories (SRAM) and dynamic random access memories (DRAM), require a power supply to store their information, while nonvolatile memories, Flash memories keep their information without.