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Bo Wang - IEEE Xplore Author Profile

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Two-dimensional magnetic recording (TDMR) [1, 2] is a promising high density storage technology, which is expected to increase an areal density (AD) up to 10 terabit per square inch (Tbpsi). This technology is required write narrow-read wide technique that opposite to write wide-read narrow of one-dimensional (1D) read channel. The narrow track writing operated by shingled writing can greatly impr...Show More
We discuss background interference (BGI) arising from the read-back of preexisting data and adjacent tracks on a recording medium. A signal-to-noise ratio analysis is used to measure the impact of BGI in heat-assisted magnetic recording in a spin-stand tester. The signal-to-noise ratio for a data track with an alternating field background was compared to a data track written over a pair of backgro...Show More
Two-dimensional (2D) modulation encoding is one of the effective solutions that was used to take action with severe intertrack interference (ITI) effect in two-dimensional magnetic recording (TDMR) system. As found in our previous work, the rate-4/5 modulation code with the ITI subtraction scheme was proposed to avoid severe ITI data patterns for TDMR, its performance outperforms an uncoded system...Show More
The huge growth of the consumer electronic industry is driving the need for achieving ultrahigh areal storage densities. 2-D magnetic recording is a promising high-density storage technology where the shingled writing technique is employed for increasing the track per inch (TPI) and achieving higher areal densities. Nevertheless, high TPI causes a reader to cover higher number of tracks, which lea...Show More
The performance of a rate-4/5 modulation code is evaluated in two-dimensional magnetic recording (TDMR) channels, where a magnetic medium is described by a discrete Voronoi model, and the two-dimensional sensitivity function of the reader is adopted to generate the TDMR readback signal. Since the read-head sensitivity function covers many tracks, it causes intertrack interference (ITI) that can de...Show More
We did an experimental study to examine the head-to-media spacing (HMS) sensitivity of electrical performance of perpendicular recording system with an adaptive flying height (AFH) heater. It also focused on the effect of the temperature rise due to the AFH heater on the instability and noise of tunneling magnetoresistance (TMR) sensors. It is firstly reported that the high temperature rise from t...Show More
This paper examines the noise effect of protection diodes used for protecting voltage breakdown during MR-shield resistance measurement in quasi-static test (QST) for giant magnetoresistive heads (GMR). Two fasions of diode protection are presented and the noise behavior of them are discussed and compared in terms of GMR noise test.Show More
This paper examines the noise effects of protection diodes used for preventing voltage breakdown during magnetoresistive (MR)-shield resistance measurement in quasi-static test (QST) for giant magnetoresistive heads (GMR). Two forms of diode protection will be presented and the noise behavior of them will be discussed and compared in the context of the GMR Noise test.Show More