JPH0520809B2 - - Google Patents
Info
- Publication number
- JPH0520809B2 JPH0520809B2 JP59134943A JP13494384A JPH0520809B2 JP H0520809 B2 JPH0520809 B2 JP H0520809B2 JP 59134943 A JP59134943 A JP 59134943A JP 13494384 A JP13494384 A JP 13494384A JP H0520809 B2 JPH0520809 B2 JP H0520809B2
- Authority
- JP
- Japan
- Prior art keywords
- emulsion
- magnetic
- ferromagnetic metal
- thin film
- glass transition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 49
- 239000000839 emulsion Substances 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 230000005294 ferromagnetic effect Effects 0.000 claims description 27
- 239000010409 thin film Substances 0.000 claims description 25
- 230000009477 glass transition Effects 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 23
- -1 polyethylene terephthalate Polymers 0.000 description 16
- 235000014113 dietary fatty acids Nutrition 0.000 description 8
- 229930195729 fatty acid Natural products 0.000 description 8
- 239000000194 fatty acid Substances 0.000 description 8
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 150000004665 fatty acids Chemical class 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 6
- 239000004793 Polystyrene Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 229920002223 polystyrene Polymers 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 4
- 238000007733 ion plating Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000001771 vacuum deposition Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000011118 polyvinyl acetate Substances 0.000 description 3
- 229920002689 polyvinyl acetate Polymers 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- 235000021357 Behenic acid Nutrition 0.000 description 2
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 CoâNi Inorganic materials 0.000 description 2
- 239000005639 Lauric acid Substances 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 235000021314 Palmitic acid Nutrition 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 2
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 229940116226 behenic acid Drugs 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- HOWGUJZVBDQJKV-UHFFFAOYSA-N docosane Chemical compound CCCCCCCCCCCCCCCCCCCCCC HOWGUJZVBDQJKV-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- MVLVMROFTAUDAG-UHFFFAOYSA-N ethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC MVLVMROFTAUDAG-UHFFFAOYSA-N 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 229960004488 linolenic acid Drugs 0.000 description 2
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 2
- LQERIDTXQFOHKA-UHFFFAOYSA-N nonadecane Chemical compound CCCCCCCCCCCCCCCCCCC LQERIDTXQFOHKA-UHFFFAOYSA-N 0.000 description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 235000021313 oleic acid Nutrition 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 2
- IIYFAKIEWZDVMP-UHFFFAOYSA-N tridecane Chemical compound CCCCCCCCCCCCC IIYFAKIEWZDVMP-UHFFFAOYSA-N 0.000 description 2
- 238000007738 vacuum evaporation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- RZRNAYUHWVFMIP-KTKRTIGZSA-N 1-oleoylglycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-KTKRTIGZSA-N 0.000 description 1
- LOUICXNAWQPGSU-UHFFFAOYSA-N 2,2,3,3-tetrafluorooxirane Chemical compound FC1(F)OC1(F)F LOUICXNAWQPGSU-UHFFFAOYSA-N 0.000 description 1
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 229910020674 CoâB Inorganic materials 0.000 description 1
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PVNIQBQSYATKKL-UHFFFAOYSA-N Glycerol trihexadecanoate Natural products CCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCC PVNIQBQSYATKKL-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Ironânickel alloy Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 125000002511 behenyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- TUTWLYPCGCUWQI-UHFFFAOYSA-N decanamide Chemical compound CCCCCCCCCC(N)=O TUTWLYPCGCUWQI-UHFFFAOYSA-N 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- FEEPBTVZSYQUDP-UHFFFAOYSA-N heptatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O FEEPBTVZSYQUDP-UHFFFAOYSA-N 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- SFIHQZFZMWZOJV-HZJYTTRNSA-N linoleamide Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(N)=O SFIHQZFZMWZOJV-HZJYTTRNSA-N 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- RZRNAYUHWVFMIP-UHFFFAOYSA-N monoelaidin Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-UHFFFAOYSA-N 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- MOQRZWSWPNIGMP-UHFFFAOYSA-N pentyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCCC MOQRZWSWPNIGMP-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229920006163 vinyl copolymer Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Description
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[Industrial Application Field] The present invention relates to a so-called ferromagnetic metal thin film type magnetic recording medium in which a ferromagnetic metal thin film is formed on a nonmagnetic support by vapor deposition, ion plating, sputtering, etc. . [Background technology and its problems] Traditionally, magnetic recording media have been made of r-Fe 2 O 3 , Co-containing r-Fe 2 O 3 , Co-containing r-Fe 2 O 3 ,
Fe 3 O 4 , Co-containing Fe 3 O 4 , r-Fe 2 O 3 and
Powder magnetic materials such as bertolide compounds of Fe 3 O 4 , bertolide compounds containing Co, oxide magnetic powders such as CrO 2 , or alloy magnetic powders whose main components are Fe, Co, Ni, etc., are mixed with vinyl chloride and acetic acid. Coating-type magnetic recording media, in which magnetic recording media are dispersed in an organic binder such as a vinyl copolymer, polyester resin, or polyurethane resin, coated, and dried, have been widely used. In recent years, with the increasing demand for high-density magnetic recording,
Ferromagnetic thin-film magnetic recording media, in which a thin metal film made of ferromagnetic metal is directly deposited on a non-magnetic support using vacuum evaporation, sputtering, ion blating, or plating, have been attracting attention. There is. This ferromagnetic metal thin film magnetic recording medium has coercive force.
Not only does it have high Hc and residual magnetic flux density Br, but the thickness of the magnetic layer can be made extremely thin, so the thickness loss during recording demagnetization and reproduction is extremely small, and the magnetic layer is made of non-magnetic material. It has many advantages in terms of magnetic properties, such as the ability to increase the packing density of the magnetic material since it is not necessary to mix an organic binder. However, in this type of magnetic recording medium, since a vacuum evaporation method or the like is used as a means of forming the ferromagnetic metal thin film, the base film, which is a non-magnetic support, is susceptible to thermal damage. However, when the evaporated metal atoms recrystallize to form a thin film, they shrink and generate internal stress, which causes the ferromagnetic metal thin film to curl into a concave shape. When such curling occurs, the contact between the magnetic recording medium and the magnetic head becomes poor, resulting in a reduction in the reproduction output and the occurrence of irregular winding. Therefore, various methods have been proposed to eliminate the above-mentioned curls. For example, it is disclosed in JP-A-53-83706, JP-A-53-104204, etc. that stress is applied after a magnetic thin film is deposited to cause a type of crack in the magnetic thin film to relieve strain stress. . Further, it is disclosed in Japanese Patent Laid-Open No. 16032/1983 that stress is relaxed by subjecting the substrate to heat treatment to shrink the substrate side after the magnetic thin film is deposited. In addition, it has been proposed in Japanese Patent Application Laid-Open No. 56-1997 that stress can be alleviated by providing a back coat layer on the back side of the magnetic recording medium, that is, on the side opposite to the magnetic layer.
-11622, JP-A-56-16939, etc. However, none of these methods can prevent curling during film formation and has many drawbacks in terms of productivity and other aspects. Curling during film formation is also an extremely serious problem even when using other deposition methods other than vapor deposition, such as sputtering and ion plating, and a sufficient preventive measure has not yet been realized. In addition, in the case of the above-mentioned ferromagnetic metal thin film type magnetic recording medium, since the ferromagnetic metal that is the magnetic layer is manufactured using vacuum thin film formation technology, the surface thereof has extremely excellent smoothness, resulting in a so-called mirror surface state. It has been known. If the surface smoothness of the magnetic layer is improved in this manner, it is advantageous in terms of spacing loss, etc., but there is a risk that it may cause problems in terms of runnability and durability. In other words, if the surface of the magnetic layer becomes too smooth, adhesion (so-called sticking) will easily occur at the contact area with, for example, a magnetic head, guide post, rotating head cylinder, etc., and the actual contact area will be reduced. Since the friction coefficient is large, running properties are extremely deteriorated, and durability is also reduced accordingly. [Object of the Invention] The present invention has been proposed in view of the above-mentioned conventional situation, and is free from curling and provides stable running performance at the contact portion with magnetic heads, rotary head cylinders, etc. The object of the present invention is to provide a magnetic recording medium whose surface roughness can be easily controlled. [Means for solving the problem] That is, the present invention provides an emulsion with a glass transition point of 30°C or less and an emulsion with a glass transition point of 30°C or less on a non-magnetic support.
An emulsion with a temperature of 50°C or higher is applied, and the emulsion with a glass transition point of 30°C or lower is used as a continuous film, and granular protrusions made of the emulsion with a glass transition point of 50°C or higher are formed at 10Ã10 4 pieces/mm 2 to 2000Ã10 The present invention relates to a magnetic recording medium characterized in that an undercoat layer having a particle density of 4 particles/mm 2 is formed, and a ferromagnetic metal thin film is formed on the undercoat layer. A magnetic recording medium according to the present invention is shown in FIG. In the figure, 1 is a non-magnetic support, 2 is a ferromagnetic metal thin film, 3 is a continuous film formed from an emulsion with a glass transition point (Tg) of 30°C or lower, and 4 is a continuous film formed of an emulsion with a glass transition point (Tg) of 50°C or higher. These are granular protrusions formed by emulsion. The undercoat layer of the magnetic recording medium according to the present invention is composed of an emulsion with a glass transition point (hereinafter referred to as Tg) of 30°C or lower and an emulsion with a Tg of 50°C or higher, and the emulsion with a Tg of 30°C or lower forms a continuous film 3, Also Tg50â
The above emulsion forms granular protrusions 4. The continuous film 3 is softer than the ferromagnetic metal thin film 2 and the non-magnetic support 1, which are magnetic layers, and is used to disperse stress concentration generated between the ferromagnetic metal thin film 2 and the non-magnetic support 1 and to relieve the stress. It is possible to suppress the occurrence of curls. Moreover, the surface roughness of the surface of the ferromagnetic metal thin film 2 can be controlled by the granular projections 4, and the running properties of the magnetic recording medium can be improved. Furthermore, the durability of the magnetic recording medium can be improved by the undercoat layer. The thicker the continuous film 3 made of emulsion with a Tg of 30°C or less, the less the amount of curl. However, as the continuous film 3 becomes thicker, the surface smoothness deteriorates and Electromagnetic conversion characteristics deteriorate. Therefore, the film thickness of the continuous film 3 is
It is desirable that the thickness is 1 ÎŒm or less. In addition, for the granular protrusions 4 made of emulsion with a Tg of 50°C or more, the particle density is important, and the granular protrusions 4 are formed on the surface of the undercoat layer at about 100,000 to 20 million pieces/mm 2 . It is desirable to be present. If the density of the granular projections 4 is less than 100,000 pieces/mm 2 , no improvement in durability can be expected, and if it exceeds 20 million pieces/mm 2 , the image quality will deteriorate. Further, the particle size of the dispersoid particles contained in the emulsion is preferably within the range of 300 to 1000 Ã
. The above particle size is 300Ã
If it is less than 1000Ã
, no improvement in durability can be expected.
Exceeding this will reduce the image quality. Examples of emulsions with a Tg of 30°C or less include polyvinyl acetate emulsion, polyacrylic acid ester emulsion, polyurethane emulsion, styrene-butadiene copolymer emulsion, polyisoprene emulsion, acrylonitrile-butadiene copolymer emulsion, etc. Can be mentioned. In addition, as an emulsion with a Tg of 50â or higher,
Examples include polystyrene emulsion, poly-α-methylstyrene emulsion, polyvinyl chloride emulsion, polymethyl methacrylate emulsion, and polyacrylonitrile emulsion. Materials for the non-magnetic support 1 include polyesters such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, cellulose derivatives such as cellulose triacetate, cellulose diacetate, and cellulose acetate butyrate, polyvinyl chloride, polyvinylidene chloride, etc. Examples include plastics such as vinyl resin, polycarbonate, polyimide, and polyamideimide. The nonmagnetic support may be in any form such as a film, tape, sheet, disk, card, or drum. Materials for the ferromagnetic metal thin film 2 include Fe, Co,
Metals such as Ni or Co-Ni alloy, Fe-Co alloy,
Fe-Ni alloy, Fe-Co-Ni alloy, Fe-Co-B alloy, Co-Ni-Fe-B alloy or these with Cr,
Examples include those containing metals such as Al. The means for depositing the ferromagnetic metal thin film material is as follows:
Examples include a vacuum evaporation method, an ion plating method, and a sputtering method. The above vacuum evaporation method is
The ferromagnetic metal material is evaporated by resistance heating, high frequency heating, electron beam heating, etc. under a vacuum of 10 -4 to 10 -8 Torr, and the evaporated metal (ferromagnetic metal material) is deposited on the non-magnetic support 1. It is broadly divided into oblique deposition method and vertical deposition method. The above-mentioned oblique vapor deposition method is a method in which the above-mentioned ferromagnetic metal material is obliquely vapor-deposited on the non-magnetic support 1 in order to obtain a high coercive force. It also includes things that are done. In the vertical evaporation method described above, in order to improve the evaporation efficiency and productivity, and to obtain high coercive force,
A base metal layer such as Bi, Sb, Pb, Sn, Ga, In, Cd, Ge, Si, Tl, etc. is formed in advance, and the above-mentioned ferromagnetic metal material is vertically deposited on this base metal layer. . The above-mentioned ion plating method is also a type of vacuum evaporation method, and involves generating DC glow discharge and RF glow discharge in an inert gas atmosphere of 10 -4 to 10 -3 Torr, and evaporating the above-mentioned ferromagnetic metal during the discharge. It is something. The above sputtering method is 10 -3 ~
A glow discharge is generated in an atmosphere mainly composed of argon gas at 10 -1 Torr, and the generated argon ions are used to knock out atoms on the target surface. , high-frequency sputtering method, and magnetron sputtering method using magnetron discharge. In addition, in order to improve the running properties of magnetic recording media,
It is also possible to form a lubricant layer on the surface of the ferromagnetic metal thin film 2 described above. As the lubricant, fatty acids, fatty acid esters, fatty acid amides, metal soaps, aliphatic alcohols, paraffins, silicones, fluorine surfactants, etc. can be used, and the amount of the lubricant applied is 1 to 1000 mg/ m2 . is preferable. Fatty acids include lauric acid, myristic acid,
Those having 12 or more carbon atoms such as palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, and linolenic acid can be used. Fatty acid esters include ethyl stearate, butyl stearate, amyl stearate,
Stearic acid monoglyceride, oleic acid monoglyceride, etc. can be used. Examples of fatty acid amides include caproic acid amide, capric acid amide, lauric acid amide, palmitic acid amide, stearic acid amide, behenic acid amide, oleic acid amide, linoleic acid amide, methylene bisstearic acid amide, ethylene bis stearic acid amide, etc. Can be used. Metal soaps include Zn, Pb, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, etc.
Salts with Ni, Co, Fe, Al, Mg, Sr, Cu, etc., salts of sulfonic acids such as lauryl, palmitin, myristyl, stearyl, behenyl, oleyl, linole, linolenic, etc. and the above metals, etc. can be used. As the aliphatic alcohol, cetyl alcohol, stearyl alcohol, etc. can be used. As paraffin, saturated hydrocarbons such as n-nonadecane, n-tridecane, n-docosane, etc. can be used. As silicones, polysiloxanes in which hydrogen is partially substituted with alkyl groups or phenyl groups, and those modified with fatty acids, aliphatic alcohols, fatty acid amides, etc. can be used. Examples of fluorosurfactants include salts of perfluoroalkylcarboxylic acids and perfluoroalkylsulfonic acids with Na, K, Mg, Zn, Al, Fe, Co, Ni, etc., perfluoroalkyl phosphate esters, and perfluoroalkyl phosphates. Alkyl betaines, perfluoroalkyltrimethylammonium salts, perfluoroethylene oxide, perfluoroalkyl aliphatic esters, etc. can be used. [Examples] Specific examples of the present invention will be described below, but it goes without saying that the present invention is not limited to these examples. Example 1 A polyvinyl acetate emulsion with a glass transition point of 29°C and a polyvinyl acetate emulsion with a glass transition point of 105 and a particle size of 300 Ã
were placed on a 12 ÎŒm thick polyethylene terephthalate film.
â polymethyl methacrylate emulsion diluted with a mixture of water and normal propyl alcohol containing 60 % by weight of normal propyl alcohol. Film thickness is 200
An undercoat layer of Ã
was formed. Next, cobalt Co was obliquely evaporated onto the undercoat layer using a vacuum evaporation device at an incident angle of 50° to 90°, and the film thickness was approx.
A sample tape with a 1300 Ã
ferromagnetic metal thin film was created. Example 2 On a polyethylene terephthalate film with a thickness of 12 ÎŒm, a polyacrylate emulsion with a glass transition point of 0°C and a polystyrene emulsion with a particle size of 300 Ã
and a glass transition point of 100°C were mixed with 60% by weight of n-propyl alcohol. Water contained
A diluted solution of normal propyl alcohol mixture was applied to form an undercoat layer with a polystyrene particle density of 4 million particles/mm 2 and a continuous film thickness of 200 Ã
. Next, a sample tape was prepared in the same manner as in Example 1. Example 3 A polyester emulsion with a glass transition temperature of -20°C and a polyester emulsion with a particle size of 300 Ã
and a glass transition temperature of 100°C were placed on a polyethylene terephthalate film with a thickness of 12 Όm.
A polystyrene emulsion diluted with a n-propyl alcohol mixture was applied to form an undercoat layer with a polystyrene particle density of 5 million particles/mm 2 and a continuous film thickness of 200 Ã
. Next, a sample tape was prepared in the same manner as in Example 1. Comparative example Cobalt Co was obliquely evaporated onto a 12 ÎŒm thick polyethylene terephthalate film at an incident angle of 50° to 90° using a vacuum evaporator to form a ferromagnetic metal thin film with a thickness of approximately 1300 Ã
, and a sample tape was created. did. When the amount of curl, still characteristics, and image quality of the sample tapes obtained in the above-mentioned Examples and Comparative Examples were measured, the results shown in the following table were obtained. The amount of curl was measured by the amount indicated by h in Figure 2 on a 1/2 inch wide magnetic recording medium, and the still characteristics were measured by recording a 4.2MHz video signal on a sample tape, and the playback output was attenuated to 50%. It was measured as the time until.
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As is clear from the description of the above examples, in the present invention, the undercoat layer is formed of an emulsion with a glass transition point of 30°C or lower and an emulsion with a glass transition point of 50°C or higher, so that curling is prevented. and control of surface roughness is achieved at the same time.
A magnetic recording medium with excellent running properties and excellent contact with a magnetic head can be obtained.
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FIG. 1 is an enlarged sectional view of a main part showing the structure of a magnetic recording medium to which the present invention is applied, and FIG. 2 is a schematic sectional view illustrating a curled state of a ferromagnetic metal thin film type magnetic recording medium. 1...Nonmagnetic support, 2...Ferromagnetic metal thin film,
3... Continuous film (undercoat layer), 4... Granular protrusions (undercoat layer).
Claims (1)
ãšãã«ãžãšã³ãšã¬ã©ã¹è»¢ç§»ç¹ã50â以äžã®ãšãã«
ãžãšã³ãå¡åžããåèšã¬ã©ã¹è»¢ç§»ç¹ã30â以äžã®
ãšãã«ãžãšã³ãé£ç¶ç®èãšãåèšã¬ã©ã¹è»¢ç§»ç¹ã
50â以äžã®ãšãã«ãžãšã³ãããªãç²ç¶çªèµ·ã10Ã
104åïŒmm2ã2000Ã104åïŒmm2ãªãç²åå¯åºŠã§æã
ãäžå¡å±€ã圢æãã該äžå¡å±€äžã«åŒ·ç£æ§éå±èè
ã圢æããããšãç¹åŸŽãšããç£æ°èšé²åªäœã1. An emulsion with a glass transition point of 30°C or lower and an emulsion with a glass transition point of 50°C or higher are coated on a non-magnetic support, and the emulsion with a glass transition point of 30°C or lower is used as a continuous coating.
10x granular projections made of emulsion at 50â or higher
1. A magnetic recording medium comprising: an undercoat layer having a particle density of 10 4 particles/mm 2 to 2000Ã10 4 particles/mm 2 ; and a ferromagnetic metal thin film formed on the undercoat layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13494384A JPS6113427A (en) | 1984-06-29 | 1984-06-29 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13494384A JPS6113427A (en) | 1984-06-29 | 1984-06-29 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6113427A JPS6113427A (en) | 1986-01-21 |
JPH0520809B2 true JPH0520809B2 (en) | 1993-03-22 |
Family
ID=15140181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13494384A Granted JPS6113427A (en) | 1984-06-29 | 1984-06-29 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6113427A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05314454A (en) * | 1992-05-08 | 1993-11-26 | Fuji Photo Film Co Ltd | Magnetic recording medium |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5919230A (en) * | 1982-07-21 | 1984-01-31 | Fuji Photo Film Co Ltd | Magnetic recording medium |
-
1984
- 1984-06-29 JP JP13494384A patent/JPS6113427A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5919230A (en) * | 1982-07-21 | 1984-01-31 | Fuji Photo Film Co Ltd | Magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPS6113427A (en) | 1986-01-21 |
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