File:Relaxed and cracked GaN.jpg
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Summary
[edit]DescriptionRelaxed and cracked GaN.jpg |
Русский: Формирование тонкопленочных структур методом МОГФЭ становится настоящим вызовом, когда формирующие структуру плёнки состоят из различных веществ. Элементарные ячейки разных веществ различаются формой и размерами, поэтому когда нужно заставить расти плёнку одного материала на поверхности плёнки другого, верхний слой испытывает сильное растягивающее напряжение. А оказавшись в таких условиях плёнка ищет пути минимизировать внутренние напряжения. Если плёнку растягивают внутренние силы, один из самых простых выходов для снятия этих напряжений - образование трещин. Они обычно образуются по направлениям кристаллографических плоскостей кристалла вещества. На изображении - снявший напряжения потрескавшийся GaN на плёнке AlN на кремнии.
English: Film formation using MOCVD can be tricky when we try to form films of different composition on each other. The basic unit cells of different materials have different shapes and sizes, so when you try to convince films to stick together they feel tensile stress. And as almost anything under stress, they start to resist and try to relax. How can films relax if something tearing you apart? They crack. Usually they crack along the boundaries of the crystallographic planes. That’s what you see on the picture - very relaxed very cracked GaN on AlN on silicon. |
Date | |
Source | Own work |
Author | Evavilova |
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This image was uploaded as part of Wiki Science Competition 2017. |
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current | 10:33, 12 December 2017 | 2,560 × 1,920 (651 KB) | Evavilova (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | NIKON |
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Camera model | DS-Fi2-L3 |
Exposure time | 1/1,600 sec (0.000625) |
Date and time of data generation | 16:48, 29 November 2017 |
User comments | CAM: DS-Fi2 IMG_MODE: FULL
EXP_MODE: PROG EXP_TIME: 60 us EXP_CMP: +-00 CAM_GAIN: 170 Y_GAIN: 100 CONTRAST: STD EFFECT: COLOR RB_ADJ: 100/100/ BK_LEVEL: +00 CHROMA: +00 HUE: +00 AE_LOCK: OFF MTR_AREA: LARGE MTR_MODE: AVERAGE NR: OFF SHARPNESS: +02 SD: OFF NAME: DS-L3 DS-L3(MAC:00-90-B5-45-00-8A) |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Software used | Adobe Photoshop Lightroom 5.7 (Windows) |
File change date and time | 17:12, 1 December 2017 |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 16:48, 29 November 2017 |
APEX shutter speed | 10.643856 |
APEX exposure bias | 0 |
Metering mode | Average |
Flash | Flash did not fire, No flash function |
Color space | sRGB |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Scene capture type | Standard |
Date metadata was last modified | 20:12, 1 December 2017 |
Unique ID of original document | 58D7ABEA8B58E906597433ADE660800F |
IIM version | 4 |