| 研究生: |
童群智 Tong, Eason |
|---|---|
| 論文名稱: |
不同製程條件對Co-Cr-Pt-B磁性薄膜性質之研究 |
| 指導教授: |
張炎輝
Chang, Yen-Hwei |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 材料科學及工程學系 Department of Materials Science and Engineering |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 80 |
| 中文關鍵詞: | 垂直記憶 、Co-Cr-Pt-B |
| 外文關鍵詞: | PMR, Co-Cr-Pt-B |
| 相關次數: | 點閱:51 下載:1 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本實驗以Co-Cr-Pt-B磁性合金為材料,研究不同製程條件對於磁性薄膜性質所造成的影響。實驗中利用射頻濺鍍的方式將Co-Cr-Pt-B合金薄膜濺鍍於矽基板上,其中Co-Cr採合金靶方式,而Pt與B採貼片方式。實驗中改變的製程條件如下:Ti 層的施加以及厚度所造成的影響、基板溫度的改變、退火溫度的改變以及退火時間的改變。
當改變Ti 層的厚度時,會直接影響到濺鍍在其上之磁性薄膜的失序層厚度,而失序層厚度的不同也會直接影響到磁性質的表現。在濺鍍過程中使用不同基板溫度只會對薄膜本身晶粒產生改變,當溫度越高晶粒也就越大。對於磁性質則無明顯改善。
退火條件的影響則較為明顯,當退火溫度上升時晶粒大小也會隨之成長。當退火溫度到達700℃時,則開始有第二相CoPt相的析出。在磁性質方面,隨著退火溫度的上升都會有一定的改善情形。至於在退火時間的改變方面,發現當退火時間越長晶粒也會有成長的情形,但在垂直膜面上的矯頑磁力卻產生下降的趨勢。
In this experiment, the Co-Cr-Pt-B magnetic thin film was used as material to find out the effect of different manufacturing processes. The magnetic thin film is deposited on Si substrate by Radio-Frequency Sputtering using composite target.
The different manufacturing processes used in this experiment are as follows: the addition and the thickness of Ti under-layer, different substrate temperature, and post annealing process including annealing temperature and annealing time.
Changing the thickness of Ti under-layer will directly affect the thickness of disordered layer while the thickness of this disordered layer will also affect the magnetic properties of thin film.
The higher the substrate temperature, the bigger grain size is after sputtering. However, the magnetic properties cannot be promoted significantly via rising substrate temperature.
The effect of post-annealing process is more obvious. The grain size grows up as the annealing temperature increases and a second phase (CoPt) begins to precipitate when the annealing temperature reaches 700℃. The magnetic properties of thin film are also enhanced with the increase of annealing temperature. The grain size grows up with annealing time, but the perpendicular coercivity tends to decrease while the annealing time is extended.
1. Toshiaki Keitoku, Jun Ariake, Naoki Honda, Kazuhiro Ouchi, J. Magn. Magn. Mater. 235(2001)34.
2. 賴耿陽編譯,”薄膜製作工藝學”,復漢出版社,1987,第四章。
3. 楊錦章譯,”基礎濺鍍電漿”,電子發展月刊,第68期,1983,13。
4. 林瑞陽編譯,真空濺鍍及其工業應用,台大慶齡工業中心演講,(1995),第八章。
5. 張煦、李學養譯,”磁性物理學”,聯經出版社,(1982)
6. S. Iwasaki and H. Yamazaki, Proc. 7 the Ann. Conf. on Magnetism, 4PA-7, (1995)
7. P.-L. Lu and S. H. Charap, IEEE Trans. Magn. MAG-30, (1994) 4230
8. Y. Maeda and M. Takahashi, “Segregated Microstructure Growth in Sputtered Co-Cr Films”, IEEE Trans. Magn., vol. 24, no.6, (1988) 3012-3014.
9. Y. Uchiyama, K. Ishibashi, H.Sato, U. Hwuang, and T. Suzuki, “Magnetic Properties and Microstructure of sputtered Co-Cr films”, IEEE Trans. Magn., vol. 23, no.5, Sept. (1987) 2058-2060.
10. U. Hwang, Y. Uchiyama, K. Ishibashi, and T. Suzuki, “Magnetic Properties and Microstructure of sputtered Co-Cr films”, Thin Solid Films, vol. 147, (1987) 231-241.
11. Y. Maeda and M. Asahi, J. Appl. Phys. 61(1987)1972.
12. M. Takahashi and Y. Maeda, Jpn. J. Appl. Phys. 29(1990) 1705.
13. Y. Maeda, M. Asahi and M. Seki, Jpn. Appl. Phys. 25(1986) L668.
14. M. Sagoi and T. Inoue, “Effect of third-element additions of Co-Cr- based films ”, J. Appl. Phys. vol. 67, no.10, (1990) 6394-6398.
15. K. Oikawa, G. W. Qin, O. Kitakami, Y. Shimada, K. Fukamichi, and K. Ishida, “Prediction of effectively elements for magnetically induced phase separation in Co-Cr-based magnetic recording media”, J. Appl. Phys., vol.79, no.5, (2001) 644-646.
16. K. M. Kemner, V. G. Harris, V. Chakarian, Y. U. Idzerda, W. T. Elam, C. C. Kao, Y. C. Feng, D. E. Laughlin, and J. C. Woicik, “The role of Ta and Pt in segregation within Co-Cr-Ta and Co-Cr-Pt thin film magnetic recording media”, J. Appl. Phys., vol. 79, no.8, (1996) 5345-5347.
17. Y. Sonobe, Y. Ikeda, H. Uchida, and T. Toyooka, ”Ti underlayer effect on the recording characteristics of Co-Cr perpendicular media with weak and strong interparticle interactions”, J. Appl. Phys., vol.81, no.8, (1997) 4667-4669.
18. O. Kitakami, Y. Ogawa, H. Fujiwara, F. Kugiya, and M. Suzuki, “Influence os Initial Growth Layer and Ti Underlayer on Magnetic Properties and Recording Characteristics of Very Thin Films of Evaporated Co-Cr Media”, IEEE Trans. Magn., vol 25, no.3, (1999) 2607-2611.
19. T. Onoue, T. Asahi, K. Kuramochi, J. Kawaji, T. Homma, and T. Osaka, “CoCrPtTa and Co/Pd Perpendicular Magnetic Recording Media with Amorphous Underlayers”, IEEE Trans. Magn., vol.37, no.4, (2001) 1592-1594.
20. A. Sato, S. Nakagawa, and M. Naoe, “Co-Cr-Ta Perpendicular Magnetic Recording Media Using Pt Seed Layer”, IEEE Trans. Magn., vol. 36, no. 5, (2000) 2387-2389.
21. D. J. Rogers, J. N. Chapman, J. P. C. Bernards, and S. B. Luitjens, “Determination of local composition in Co-Cr films deposited at different substrate temperatures”, IEEE Trans. Magn., (1989) 4180-4182.
22. Y. Uchiyama, H. Sato, and Y. Kitamoto, “Effect of substrate temperature on magnetic and microstructural properties of sputtered Co-Cr films with perpendicular magnetic anisotropy”, IEEE Tran. Magn., vol. 28, no.5, (1992) 2010-2017.
23. P. W. Jang, T. D. Lee, Y. H. Kim, and T. Kang, “Heat treatment effects of CoCr sputtered films”, IEEE Tran. Magn., vol. 26, no.5, (1990) 1623-1625.
24. N. Inaba, Y. Uesaka, and M. Futamoto, “Compositional and temperature dependence of basic magnetic properties of CoCr-alloy thin films”, IEEE Tans. Magn., vol. 36, no. 1, (2000) 54-59.
25. A. Fartash, and H. Oesterreicher, “Magnetic properties of Co-Cr films and the effects of heat treatment”, J. Appl. Phys., vol. 66, no.7, (1989) 3275-3281.
26. M. Sato, Y. Onishi, and A. Nakaue, “Co-based alloy media with a high coercivity prepared by heat treatment after sputtering”, IEEE Tran. Magn., vol.29, no.6, (1993) 3685-3687.