Granted Patent B1

US 8,947,651 · App. 13/685,665 · Granted Feb 3, 2015

Abstract

Claims (28)

1. 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.

2. The tester of claim 1 wherein the laser transmitter and the laser receiver are configured to receive a first head stack assembly, and a second head stack assembly, and the laser guide is configured to block the laser beams from entering a gap in the first head stack assembly and reaching the laser receiver, and to block the laser beams from entering a gap in the second head stack assembly and reaching the laser receiver.

3. The tester of claim 2 wherein the laser guide defines a rectangular shaped opening.

4. The tester of claim 1 wherein the laser guide is configured to be located between the laser transmitter and the head stack assembly.

5. The tester of claim 1 wherein the laser guide is configured to be located between the head stack assembly and the laser receiver.

6. The tester of claim 1 wherein the laser guide comprises a stainless steel material.

7. The tester of claim 1 wherein the laser guide comprises a tungsten carbide material.

8. The tester of claim 1 wherein the laser guide further comprises a tower reference plane.

9. 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.

10. The method of claim 9 further comprising:

placing a first head stack assembly, and a second head stack assembly, between the laser transmitter and the laser receiver;

blocking laser beams from entering a gap in the first head stack assembly and reaching the laser receiver, using the laser guide; and

blocking laser beams from entering a gap in the second head stack assembly and reaching the laser receiver, using the laser guide.

11. The method of claim 9 further comprising placing the laser guide between the laser transmitter and the head stack assembly.

12. The method of claim 9 further comprising placing the laser guide between the head stack assembly and the laser receiver.

13. The method of claim 9 wherein the laser guide defines a rectangular shaped opening.

14. The method of claim 9 wherein the laser guide comprises a stainless steel material or a tungsten carbide material.

15. The method of claim 9 wherein the laser guide further comprises a tower reference plane.

Assignments (8)