Apparatus for coating a lapping plate platen, and related methods of using

Patent metadata

Field	Value
Publication number	US-11123758-B2
Application number	US-201916542483-A
Country	US
Kind code	B2
Filing date	Aug 16, 2019
Priority date	Aug 21, 2018
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

The present disclosure involves apparatuses and methods for coating a lapping plate with an aqueous composition. The apparatus can be configured and the aqueous composition can be formulated so that the aqueous composition can flow to a spray nozzle device solely due to gravity in a batchwise manner.

First claim

What is claimed is:

1. A method of coating a lapping plate platen, wherein the method comprises:
a) providing a first volume of an aqueous composition in a container, wherein the aqueous composition comprises:
i) a solid resin powder;
ii) a plurality of solid abrasive particles; and
iii) an aqueous carrier;

b) providing a spray nozzle device in fluid communication with the container;
c) spraying a second volume of the aqueous composition onto an underlying lapping plate platen to form a layer of the aqueous composition on the surface of the platen, wherein the aqueous composition has a viscosity so that the aqueous composition can flow from the container to the spray nozzle device due to gravity.

2. The method of claim 1 , further comprising stopping the spraying the aqueous composition, wherein a third volume of the aqueous composition remains in the container, and wherein the third volume is less than the second volume.

3. The method of claim 1 , wherein the first volume is an amount that can fully coat no more than the lapping plate platen.

4. The method of claim 1 , wherein the aqueous composition has a Brookfield viscosity of 150 centipoise or less when measured at 21° C. and 60 rpm with a #3 spindle.

5. The method of claim 1 , wherein providing the first volume comprises:
a) agitating the first volume to suspend the solid resin powder and plurality of solid abrasive particles throughout the aqueous carrier, wherein agitating is performed for a time period of 10 minutes or less; and
b) transferring the first volume to the container after agitating the first volume.

6. The method of claim 1 , further comprising, after step (c):
a) evaporating the aqueous carrier; and
b) substantially curing the solid resin powder to form an abrasive coating comprising the solid abrasive particles and the cured resin.

7. The method of claim 1 , wherein the aqueous carrier comprises water and a dispersant.

8. The method of claim 7 , wherein the dispersant comprises a surfactant, and wherein the dispersant is present in an amount of 10 percent or less by weight based on the total weight of the aqueous carrier.

9. The method of claim 7 , wherein the dispersant comprises at least one surfactant chosen from an anionic surfactant, an nonionic surfactant, and mixtures thereof.

10. The method of claim 7 , wherein the aqueous carrier further comprises one or more organic solvents, wherein the one or more organic solvents are present in an amount of 10 percent or less by weight based on the total weight of the aqueous carrier.

11. The method of claim 1 , wherein the solid resin powder has an average particle diameter in the range from 0.1 to 100 micrometers.

12. The method of claim 1 , wherein the solid resin powder has a particle density in the range from 0.5 to 50 grams per cubic centimeter.

13. The method of claim 1 , wherein the solid resin powder comprises thermosetting solid resin powder.

14. The method of claim 1 , wherein the solid resin powder is chosen from solid epoxy resin powder, solid vinyl resin powder, solid polyester resin powder, and blends thereof.

15. The method of claim 1 , wherein the abrasive particles have an average particle diameter in the range from 0.01 to 10 micrometers.

16. The method of claim 1 , wherein the abrasive particles have a particle density in the range from 0.5 to 50 grams per cubic centimeter.

17. The method of claim 1 , wherein the abrasive particles are chosen from diamond particles, cubic boron nitride particles, alumina particles, alumina zirconia particles, silicon carbide particles, and combinations thereof.

18. The method of claim 1 , wherein the abrasive particles are embedded within ceramic material.

19. The method of claim 1 , wherein the first volume is in the range from 10 to 500 milliliters.

20. The method of claim 1 , wherein the aqueous carrier and a total of the solid resin powder and the plurality of solid abrasive particles are present in the aqueous composition in an amount so that a weight ratio of the total of the solid resin powder and the plurality of solid abrasive particles to the aqueous carrier is in the range from 1 to 10.

Assignees

• Seagate Technology Llc

Inventors

• Blum Nicholas
• Habermas Andrew
• Anderson Ricky
• Baurceanu Mihaela Ruxandra

Classifications

• B05B7/2478

  Gun with a container which, in normal use, is located above the gun · CPC title

• B24B37/14 Primary

  characterised by the composition or properties of the plate materials · CPC title

• B05B15/60

  Arrangements for mounting, supporting or holding spraying apparatus · CPC title

• B05B7/149

  with separate inlets for a particulate material and a liquid to be sprayed · CPC title

• B05B7/1436 Primary

  to a container where the particulate material and the additional liquid are brought together (mixing in general B01F) · CPC title