Grinding liquid used for grinding back surface of storage hard disk magnetic head

Abstract

The invention discloses a grinding liquid used for grinding the back surface of a magnetic head of a memory hard disk, belonging to the technical field of surface superfine grinding. The grinding liquid contains the following components: mineral oil of eleven-carbon to thirteen-carbon alkanes, oily agent, diamond single crystal superfine powder, anti-oxidant and anti-corrosion agent, non-ionic surfactant, defoamer and antistatic agent, The weight ratio of each component is: alkane mineral oil: 50-94.79%; oily agent: 5-35%; diamond superfine powder: 0.01%-5%; anti-oxidant preservative: 0.02-0.5%; non-ionic Surfactant: 0.1-5%; defoamer: 0.03-1.5%; antistatic agent: 0.05-3.0%. The use of the grinding liquid can reduce the cost, improve the work efficiency and improve the surface grinding precision, the surface has no scratches after grinding, the surface residual stress is low, and the surface roughness is 0.3-0.4 nanometers.

Description

technical field

[0001] The invention relates to a grinding liquid used for grinding the back surface of a magnetic head of a memory hard disk, and belongs to the technical field of surface ultrafine grinding. Background technique

[0002] The surface quality of memory hard disk heads is the bottleneck that limits the capacity and storage density of memory hard disks. In order to improve the surface quality of the magnetic head, many people have conducted a lot of research. The current research mainly focuses on the superfine grinding and polishing of the front side of the magnetic head, while the research on the back side of the magnetic head is rarely involved. The surface quality of the back of the magnetic head is very important to eliminate the stress concentration phenomenon of the magnetic head and the subsequent processing quality of the magnetic head. At present, the grinding liquid on the back of the magnetic head is the same as that on the front of the magnetic h...