Abstract: The present application relates to a mold for substrate surface functionalization. In the mold, a rubber strip is provided between an upper mold plate and a lower mold plate in a clamping manner, and a fastening structure enables the upper mold plate and the lower mold plate to clamp in opposite directions, such that the rubber strip, the upper mold plate and the lower mold plate form a mold cavity together under the action of a clamping force; and a positioning structure is used for fixing a substrate in the mold cavity, such that a pouring space is formed between at least one side surface of the substrate and the upper mold plate and/or the lower mold plate, the pouring space being used for pouring a modified material for surface functionalization of the substrate. The present invention further relates to a method for substrate surface functionalization.

Abstract: Described embodiments provide a magnetic mass storage device with a system clock phase-locked to servo address marks on the magnetic disk. A head sequentially reads multiple adjacent servo address marks in a spiral track of servo address marks. When a servo address mark detector detects a mark, the count value of a counter driven by the system clock is sampled and held by a latch. A system clock synthesizer calculates differences in value between successively sampled count values from the latch, averages the differences in value to create an average difference value, and normalizes a difference between the average difference value and a target value to create a phase error value. The phase of the system clock is updated using the phase error value.

Abstract: Described embodiments provide a magnetic mass storage device with a system clock phase-locked to servo address marks on the magnetic disk. A head sequentially reads multiple adjacent servo address marks in a spiral track of servo address marks. When a servo address mark detector detects a mark, the count value of a counter driven by the system clock is sampled and held by a latch. A system clock synthesizer calculates differences in value between successively sampled count values from the latch, averages the differences in value to create an average difference value, and normalizes a difference between the average difference value and a target value to create a phase error value. The phase of the system clock is updated using the phase error value.