REDUCING CARBONACEOUS SMEAR AT THE NFT AREA ON HAMR HEAD
The present disclosure generally relates a method for removing a smear from a write head in a HAMR system. The smear can be removed by sufficiently heating the smear in an oxidative atmosphere to oxidize the smear. The material buildup that forms the smear has carbon, that when oxidized, is a gaseous product that leaves the write head with a reduced and/or eliminated smear. The heating occurs when the head is disposed in the parking location on the ramp remote from the magnetic media. Heating is possible using the same heat source for the HAMR head that is used to write data to the magnetic media.
1 . A method, comprising:
writing data to a magnetic media using a heat assisted magnetic recording write head, wherein the write head includes a near field transducer, and wherein a light source is coupled to the write head;
moving the write head and light source to a parking location; and
heating the near field transducer while the write head is at the parking location.
2 . The method of claim 1 , wherein the heating occurs for between about 1 second to about 1 minute.
3 . The method of claim 2 , wherein the near field transducer is heated to a temperature of between about 100 degrees Celsius and about 300 degrees Celsius.
4 . The method of claim 3 , wherein the heating occurs in an environment containing at least about 1 percent oxygen.
5 . The method of claim 1 , wherein the near field transducer is heated to a temperature of between about 100 degrees Celsius and about 300 degrees Celsius.
6 . The method of claim 1 , wherein the heating occurs in an environment containing at least about 1 percent oxygen.
7 . A method, comprising:
applying a first current to a light source;
writing data to a magnetic media using a heat assisted magnetic recording write head, wherein the write head includes a near field transducer, and wherein the light source is coupled to the write head;
moving the write head and light source to a parking location; and
applying a second current to the light source while the write head is at the parking location, wherein the second current is applied separately from the first current.
8 . The method of claim 7 , wherein the applying a second current occurs for between about 1 second to about 1 minute.
9 . The method of claim 8 , wherein the applying a second current occurs in an environment containing at least about 1 percent oxygen.
10 . The method of claim 9 , wherein the first current is between about 50 mA and about 70 mA.
11 . The method of claim 10 , wherein the second current is between about 20 percent and about 300 percent of the first current.
12 . The method of claim 7 , wherein the applying a second current occurs in an environment containing at least about 1 percent oxygen.
13 . The method of claim 7 , wherein the first current is between about 50 mA and about 70 mA.
14 . The method of claim 13 , wherein the second current is between about 20 percent and about 300 percent of the first current.
15 . The method of claim 7 , wherein the second current is between about 20 percent and about 300 percent of the first current.
16 . The method of claim 7 , wherein the second current is up to about one half of the first current.
17 . A method, comprising:
writing data to a magnetic media using a heat assisted magnetic recording write head, wherein the write head includes a near field transducer, wherein a light source is coupled to the write head, and wherein the writing creates a smear on the near field transducer;
moving the write head and light source to a parking location; and
oxidizing the smear while the write head is at the parking location.
18 . The method of claim 17 , wherein the oxidizing occurs for between about 1 second to about 1 minute.
19 . The method of claim 17 , wherein the oxidizing occurs in an environment containing at least about 1 percent oxygen.
20 . The method of claim 17 , wherein the oxidizing produces at least one product selected from the group consisting of CO, CO 2 and combinations thereof.