In-line film forming apparatus and manufacturing method of magnetic recording medium
View Patent ↗An in-line film forming apparatus capable of conveying a carrier at a high speed, increasing the exhaust capability within a film forming chamber, and easily realizing a high vacuum degree in a short time is provided. A conveyor mechanism has a linear motor drive mechanism which drives the carrier in a noncontact state, a horizontal guide mechanism which is provided so as to be able to contact a side portion of the carrier, and guides the carrier driven by the linear motor drive mechanism in a horizontal direction, and a vertical guide mechanism which is provided so as to be able to contact a lower end of the carrier, and guides the carrier driven by the linear motor drive mechanism in the vertical direction.
1. A manufacturing method of a magnetic recording medium, comprising a step of forming at least a magnetic layer on the surface of a substrate by conveying the substrate between a plurality of film forming chambers in an in-line film forming apparatus
wherein
the in-line film forming apparatus comprising:
a plurality of film forming chambers in which film forming processing is performed;
a carrier which holds a substrate serving as an object to be film-formed within the plurality of film forming chambers in a vertical arrangement, wherein the carrier has an upper end that contains a substrate mounting portion and lower end below the substrate mounting portion; and
a conveyor mechanism which sequentially conveys the carrier through the plurality of film forming chambers,
wherein the conveyor mechanism comprises
a linear motor drive mechanism which drives the carrier in a noncontact state;
a horizontal guide mechanism which is provided so as to be able to contact a side portion of the carrier, and guides the carrier driven by the linear motor drive mechanism in a horizontal direction; and
a vertical guide mechanism which is provided so as to be able to contact a lower end of the carrier, and guides the carrier driven by the linear motor drive mechanism in the vertical direction,
wherein the horizontal guide mechanism or the vertical guide mechanism comprises
a plurality of bearings,
a plurality of shafts, and
a damping member,
wherein the plurality of bearings is rotatably attached to the plurality of shafts arranged in the conveying direction of the carrier via the damping member, and a noncontact state between the shafts and the bearings is maintained via the damping member, and then, the damping member absorbs vibration which is transmitted to the carrier by contact with the bearing;
the load applied each bearing constituting the vertical guide mechanism is 0 N, or the load applied each bearing that the carrier has contact with, among the plurality of bearings constituting the vertical guide mechanism, is less than or equal to 9.8 N; and
the load applied each bearing that the carrier has contact with, among the plurality of bearings which constitute the horizontal guide mechanism, is less than or equal to 98 N.
2. The manufacturing method of a magnetic recording medium according to claim 1 ,
wherein the damping member is an O ring.
3. The manufacturing method of a magnetic recording medium according to claim 1 ,
wherein the in-line film forming apparatus further comprises a sensor which detects contact between the shafts and the bearings.
4. The manufacturing method of a magnetic recording medium according to claim 1 ,
wherein the linear motor drive mechanism further comprises
a magnetic body provided at a side portion of the carrier, and
a plurality of electromagnets arranged in the conveying direction of the carrier at a position which faces the magnetic body.
5. The manufacturing method of a magnetic recording medium according to claim 4 ,
wherein the magnetic body is a permanent magnet.
6. The manufacturing method of a magnetic recording medium according to claim 4 ,
wherein the electromagnets are provided outside the film forming chambers.