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The top of the capacitor is connected to the access transistor's drain terminal via a polysilicon strap (Kenner, pp. 42–44). A trench capacitor's depth-to-width ratio in DRAMs of the mid-2000s can exceed 50:1 (Jacob, p. 357). Trench capacitors have numerous advantages.
The two most common types of DRAM memory cells since the 1980s have been trench-capacitor cells and stacked-capacitor cells. [25] Trench-capacitor cells are where holes (trenches) are made in a silicon substrate, whose side walls are used as a memory cell, whereas stacked-capacitor cells are the earliest form of three-dimensional memory (3D ...
The two main types of random-access memory (RAM) are static RAM (SRAM), which uses several transistors per memory cell, and dynamic RAM (DRAM), which uses a transistor and a MOS capacitor per cell. Non-volatile memory (such as EPROM, EEPROM and flash memory) uses floating-gate memory cells, which consist of a single floating-gate transistor per ...
in DRAM memory circuits, capacitor trenches may be 10–20 μm deep, in MEMS, DRIE is used for anything from a few micrometers to 0.5 mm. in irregular chip dicing, DRIE is used with a novel hybrid soft/hard mask to achieve sub-millimeter etching to dice silicon dies into lego-like pieces with irregular shapes. [7] [8] [9]
San Leandro, California: 1948: 1954: Dodge and Plymouth cars: Plant sold to International Harvester in 1955, then sold to Caterpillar in 1970. Current location of Westgate Center Shopping Center at 1933 Davis Street, San Leandro, CA 94577 Mound Road Engine: Detroit, Michigan: 1953: 2002
Ferroelectric RAM (FeRAM, F-RAM or FRAM) is a random-access memory similar in construction to DRAM but using a ferroelectric layer instead of a dielectric layer to achieve non-volatility. FeRAM is one of a growing number of alternative non-volatile random-access memory technologies that offer the same functionality as flash memory .
Digitally tuned capacitor, a type of electrical capacitor whose capacitance can be changed by means of a digital control signal; Direct Torque Control, a method to control electric motors with very good torque dynamics; Direct traffic control, a method of authorizing track occupancy on American railroads
Ferroelectric RAM (FeRAM, F-RAM or FRAM) is a form of random-access memory similar in construction to DRAM, both use a capacitor and transistor but instead of using a simple dielectric layer the capacitor, an F-RAM cell contains a thin ferroelectric film of lead zirconate titanate [Pb(Zr,Ti)O 3], commonly referred to as PZT. The Zr/Ti atoms in ...