Tester for measuring a pitch static attitude of a head stack assembly
AssigneeWestern Digital Technologies, Inc.
InventorsChaiya Thongrattana, Angkhan Thongsuksai, Prasertsak Naksakul, Teeraporn Srikwanjai, Chainat Krudpuek
Life of this patent
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Abstract
A tester for measuring a pitch static attitude of a head stack assembly including a laser transmitter configured to transmit laser beams, and a laser receiver configured to receive the laser beams from the laser transmitter, wherein the laser transmitter and the laser receiver are configured to receive a head stack assembly between the laser transmitter and the laser receiver. The tester also includes a laser guide located between the laser transmitter and the laser receiver, and configured to block the laser beams from entering a gap in the head stack assembly and reaching the laser receiver.
Claims15
A tester for measuring a pitch static attitude of a head stack assembly comprising:
- a laser transmitter configured to transmit laser beams;
- a laser receiver configured to receive the laser beams from the laser transmitter, wherein the laser transmitter and the laser receiver are configured to receive a head stack assembly between the laser transmitter and the laser receiver;
- and
- a laser guide located between the laser transmitter and the laser receiver, and configured to:
- block some of the laser beams from entering at least one of:
- (1) a gap between a slider of the head stack assembly and a flexure of the head stack assembly and (2) a gap between a beam of the head stack assembly and a flexure of the head stack assembly and reaching the laser receiver;
- allow other of the laser beams not blocked by the laser guide to reach the laser receiver.
A method for measuring a pitch static attitude of a head stack assembly using a tester comprising a laser transmitter, a laser receiver, and a laser guide, the method comprising:
- placing a head stack assembly between the laser transmitter and the laser receiver;
- placing a laser guide between a laser transmitter and a laser receiver;
- transmitting laser beams from the laser transmitter to the laser receiver;
- blocking, using the laser guide, some of the laser beams from entering at least one of:
- (1) a gap between a slider of the head stack assembly and a flexure of the head stack assembly and (2) a gap between a beam of the head stack assembly and a flexure of the head stack assembly and reaching the laser receiver;
- and
- allowing other of the laser beams not blocked by the laser guide to reach the laser receiver.
Dependencies are inferred from the claim text.