Raising EEPROM voltage to beat noise

LONDON – Mobile phone and tablet computers are now so densely packed with chips that they can interfere with each other, in particular with touch-screen sensing ICs giving rise to false moves and taps, according to analog and mixed-signal chip and foundry vendor MagnaChip Semiconductor Corp. (Seoul, South Korea). The company has responded to the problem by offering a high-voltage option for its 0.18-micron embedded EEPROM technology.

The process module has been developed to work at 20-volts with high-voltage capacitors and 20-V transistors to improve the signal-to-noise ration and noise immunity.

In particular the trend in smartphones, tablet computers towards thinner designs has resulted in a closer proximity of components and power management circuits and this has caused an increased susceptibility to both internal and external electronic noise, MagnaChip said.

The use of 20-V transistors and capacitors has been introduced without compromising memory and logic performance characteristics, MagnaChip added. MagnaChip said it is also preparing a 30-V EEPROM process suitable for mobile applications with larger screens. The 30-V EEPROM is due to be available in 2013.

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