کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1675527 | 1008980 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical mechanical polishing characteristics in (Bi,La)Ti3O12 damascene process for high-density ferroelectric memories
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Chemical mechanical polishing characteristics in (Bi,La)Ti3O12 damascene process for high-density ferroelectric memories Chemical mechanical polishing characteristics in (Bi,La)Ti3O12 damascene process for high-density ferroelectric memories](/preview/png/1675527.png)
چکیده انگلیسی
Ferroelectric thin films such as Pb(Zr,Ti)O3, SrBi2Ta2O9, and Bi3.25La0.75Ti3O12 (BLT) thin films have been widely investigated for non-volatile ferroelectric memories. BLT thin films show advantages such as highly fatigue resistance, low processing temperature, and large remanent polarization. The patterning of these ferroelectric thin films with a vertical sidewall and without plasma damage is strongly required. Chemical mechanical polishing (CMP) process was investigated for the vertical sidewall patterning of BLT thin films. Removal rate and within-wafer non-uniformity (WIWNU%) were examined by change of process parameters. Potential of hydrogen (pH) in slurry was varied for an improvement of the removal rate and WIWNU%. Surface roughness of BLT thin films after CMP process for the improvement of densification was inquired into by atomic force microscopy. The excellent performance such as 188.4Â nm/min of removal rate, 2.61% of WIWNU%, 0.95Â nm of root mean square roughness, and 6.94Â nm of peak-to-valley roughness was obtained. This result will lead the CMP process to pattern the BLT thin films for the vertical sidewall without plasma damage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 515, Issue 16, 4 June 2007, Pages 6456-6459
Journal: Thin Solid Films - Volume 515, Issue 16, 4 June 2007, Pages 6456-6459
نویسندگان
Nam-Hoon Kim, Sang-Hun Shin, Pil-Ju Ko, Woo-Sun Lee,