TH24622B - Method for making a glass substrate for a magnetic disk and a method for making a magnetic disk. - Google Patents

Abstract

DC60 (10/03/41) adopts the surface of the glass substrate taken from the liquid for its chemical resistance. Through a process using hot acid (For example, sulfuric acid concentrated at higher temperatures 100, or operator Dissolves soluble organic matter such as glycerol or polyethylene glycol), the result is able to eliminate The salt sludge is melted efficiently without damaging the glass substrate and preventing replacement. The quality of the glass surface can be converted to a high level. The surface of the glass substrate that has been raised from the liquid is used to make it chemically resistant. Through a process using hot acid (For example, sulfuric acid concentrated at higher temperatures 100, or operator Dissolves soluble organic matter such as glycerol or polyethylene glycol), the result is able to eliminate The salt sludge is melted efficiently without damaging the glass substrate and preventing replacement. The quality of the glass surface can be converted to a high level.

Claims (4)

1. The glass substrate method for magnetic disks consists of the steps of: Making the glass substrate chemically resistant by immersing the glass substrate into a liquid. For making it chemically resistant to being heated And exchange the ions of the Exchange in the surface layer of the glass substrate with the ions in the liquid for chemical resistance: and the surface passage of the glass substrate taken from the liquid for chemical resistance by Immersion of the glass substrate into 50% thick sulfuric acid by weight or more is heated. The temperature at which the alkali ionization close near the surface of the glass substrate is reached. 2. Method according to claim 1, where the heat temperature of the hot acid ranges from more than 100 ํ to 300 ํ. C. 3. Method according to claim 1, where the time spent in the hot acid process is from One minute to two hours 4. Method according to claim 1, where hot acid may be hot concentrated sulfuric acid, hot concentrated sulfuric acid more than 100 ํ with 96% concentration. Or acids containing sulfuric acid and / or phosphoric acid 5. Method of claim 4, where sulfuric acid And / or phosphoric acid has hydrogen. 6. Method for claim 1, whereby the process of making a glass substrate to have a chemical resistance. This includes the steps of: (i) heating a liquid for its chemical resistance to The temperature at which the melting point of the salt is or higher; (ii) Immersion of the sorbent into a liquid to make it chemically resistant. A predetermined duration; (iii) the introduction of the glass substrate from the liquid; (iv) Substrate gradually Cools down to temperatures in the range from 300 ํ up to 150 ํ; And (v) rapid cooling of the substrate in contact with the rifugerant (refrigerant). 7. Magnetic disk method, which consists of the steps of: substrate preparation. The glass for the magnetic disk was obtained by using the method claimed in Claim 1; And magnetic layer formation on the surface of the glass substrate. 8. Glass substrate method for recording mediums consisting of (a) Si-O-Na Na + ion exchange as The microslink is on the surface of The glass substrate with hydronium ions formed from the water in the solution used. In the process which resulted in the formation of xylanolic groups By touching the glass substrate with Process solutions And then (b) Si-O-Si crosslinking to inhibit dissolution of ions present in the glass substrate. It is released by heating the glass substrate to extract water from the silanol group, resulting in Si-O-Si crosslinking. 9. Glass substrate method for magnetic disks consisting of Procedure: Making the glass substrate chemically resistant by immersing the glass substrate into a liquid. For making it chemically resistant to being heated And exchange the ions of the Exchange in the surface layer of the glass substrate with ions in the liquid for chemically resistant; And through the surface of the glass substrate taken from the liquid to make it chemically resistant. With sulfuric acid 50% by weight or more heated to temperatures between 100 ํ and 300 ํ C 1 0. Method according to claim 9, whereby the time of In the process of hot acid is one minute to two hours. 1. Method according to claim 9, where the acid may be hot concentrated sulfuric acid, hot concentrated sulfuric acid up to 100 ํ C with a concentration of 96%, or acid with acid. Sulfuric and / or phosphoric acid are also present 1. 2. Method according to claim 11, where sulfuric and / or phosphoric acid contain hydrogen. Peroxide is with 1. 3. Method according to claim 9, whereby the process of making the glass substrate durable Chemical includes the process of: (i) heating a liquid for making it chemically resistant to The temperature at which the melting point of the salt is or higher; (ii) Immersion of the sorbent into a liquid to make it chemically resistant. A predetermined duration; (iii) the introduction of the glass substrate from the liquid; (iv) Substrate gradually Cools down to temperatures between 150 and 300 C; And (v) rapid cooling of the substrate in contact with the rifugerant. (Cooling agent) 1 4. Magnetic Disc Method, which consists of the steps of: Preparation of a glass substrate for a magnetic disk obtained by using the method claimed in Clause 9; And the formation of magnetic layers on the surface of the glass substrate