쉐도잉 연습: How do microSD Cards Store 2 TB in such a TINY space? - 영상으로 영어 말하기 배우기
레슨 만드는 중...
1
Micro SD cards are the most compact and dense commercial data storage format there is.
2
For example, if you took a shoebox and filled it with micro SD cards,
3
you could store every single movie and TV show from your favorite streaming platform
4
and it would only take up a small fraction of the shoebox.
5
In fact, if you could get your hands on hundreds of millions of micro SD cards, you could store all the data of the entirety of the internet inside your living room
6
and you would still have a little space left
7
so let's answer the key question how exactly are micro sd cards able to store
8
so much data in such a tiny space let's open one up
9
and find out inside we find a multi layered sandwich of integrated circuits resistors capacitors hair thin wires
10
and other metal layers all squeezed together in a marvel of miniaturization, packaging, and sandwich making.
11
Most of these integrated circuits, called dies, are NAND flash chips, and they're the structures that actually hold the data.
12
These NAND flash dies are organized into two stacks of eight.
13
However, because they're stacked one on top of the other, each die must be incredibly thin, equivalent to the thickness of a single strand of hair.
14
Despite being so thin, there's a ton of incredible engineering packed inside.
15
Let's zoom in even further to a nanoscopic view of one of these NAND flash chips.
16
Here we have a massive three -dimensional array of NAND cells, also known as charged trap flash.
17
This array stands over 200 layers tall, and across a single die there are roughly 72 ,000 cells wide by 48 ,000 cells deep.
18
When we zoom all the way in, we can see the individual charge -trap flash storage cells, each of which is only about 100 nanometers across,
19
and holds three bits of data by trapping electrons inside a thin layer of silicon nitride.
20
This three -dimensional design with hundreds of memory cells stacked one
21
on top of the other is the key to achieving such incredible memory densities.
22
But how is it built?
23
well like all microchips it's built on a silicon wafer inside a semiconductor fab there are thousands of steps
24
but the basic idea is this first layer after layer of alternating silicon oxide
25
and silicon nitride is deposited to build up the stack of 100 or
26
so storage cells next the massive grid of 72 by 48
27
000 cylindrical holes is etched straight down through all the layers creating channels
28
which are subsequently filled with a complex sequence of materials.
29
As a result, a single memory cell is formed at each intersection where a vertical column crosses a horizontal layer of silicon nitride.
30
This forms the first deck of a hundred memory cells.
31
The entire process is repeated with another series of layering
32
and etching vertical holes to build the second deck of 100
33
or more memory cells
34
which must perfectly align with the prior one next wires are added across the tops of the columns
35
and connected to the read write and erase control wires
36
that select each layer
37
and step down the sides of the array like a staircase
38
a protective insulating layer is then added on top encapsulating the
39
delicate wires on the die's top surface With the top side complete, attention turns to the bottom.
40
The silicon wafer these chips are made on is far too thick on its own,
41
so the underside is ground away until each die is only about 40 micrometers thick, which is, as we said earlier,
42
the thickness of a single strand of hair.
43
From here, each die is thoroughly tested, and the flawless ones are cut out from the wafer and stacked eight high,
44
with each die offset slightly from the one below it.
45
This offset leads a row of bond pads exposed along the edge of every die.
46
Incredibly thin bond wires are then welded onto these pads, connecting each die down to the layers of interconnects beneath the stack.
47
The interconnects route over to the controller die, which in turn connects to the contact pins on the outside of the card,
48
allowing data to flow to and from the stacks of NAND flash dies.
49
Finally, the entire package is sealed in epoxy and then encapsulated in a thin plastic shell.
50
And that's the whole marvel.
51
Over 200 layers of charge -trap cells etched, stacked, and wired with nanometer precision.
52
All sealed into something smaller than your fingernail.
53
It's semiconductor engineering at the absolute edge of what's physically possible.
54
And if you want to follow where that edge goes next, that's what today's sponsor delivers.
55
This video is sponsored by IEEE Spectrum, the world's leading engineering magazine, with over 60 years of independent, unbiased journalism.
56
Stacking silicon is a future of semiconductors, and Spectrum is all over it.
57
In the April issue, they break down high -bandwidth memory,
58
stacks of ultra -thin DRAM dyes that feed AI chips the terabytes of data they need every second.
59
And then July recounts how a lab accident transformed an ordinary transistor into an artificial neuron
60
that could dramatically cut AI's power bill.
61
The best way to read Spectrum is through the print magazine, a curated, distraction -free, deep dive at your door every month with no ads,
62
no pop -ups, and no algorithm.
63
If you made it this far into a video about charge -trap flash, it's basically made for you.
64
Get 20 % off an annual subscription using the QR code on the screen
65
or the link spectrum .ieee .org slash branch education down in the description below.
📺 같은 채널
C11
The Engineering that Runs the Digital World 🛠️⚙️💻 How do CPUs Work?
Business EnglishUniversity StudentsWorking Adults
C19
How are Microchips Made? 🖥️🛠️ CPU Manufacturing Process Steps
Business EnglishUniversity StudentsWorking Adults
C1How does Tap to Pay Work?
Business EnglishUniversity StudentsWorking Adults
C1How do SSDs Work? | How does your Smartphone store data? | Insanely Complex Nanoscopic Structures!
Business EnglishUniversity StudentsWorking Adults
✨ 추천 영상
C11
120 문장
Learn Data Modeling in 8 minutes: Dimensional Data Modeling, Data Vault, and One Big Table
Business EnglishUniversity StudentsWorking Adults
B21
41 문장
Making a 360° Controller Smaller than a Penny!
Business EnglishUniversity StudentsWorking Adults
C11
77 문장
The Secret Sauce Behind NoSQL: LSM Tree
Business EnglishUniversity StudentsWorking Adults
C11
27 문장
You are wasting memory
Business EnglishUniversity StudentsWorking Adults
C11
28 문장
Gemma 4 Just Released - Whats In? In 2026!
Business EnglishUniversity StudentsWorking Adults
C11
375 문장
Configure storage accounts | AZ-104 | Episode 16
Business EnglishUniversity StudentsWorking Adults
B23
181 문장
Inside The World’s Biggest Military Plane
TOEFL PrepBusiness EnglishUniversity Students
B21
74 문장
What's Inside a Credit Card Chip? How It Actually Works
Business EnglishUniversity StudentsWorking Adults
C12
51 문장
How to do ACTIVE RECALL Effectively? (4 Techniques worked for me)
Business EnglishUniversity StudentsWorking Adults
C12
162 문장
Crypto Agility Explained: Protect Data from Quantum Computing Threats
Business EnglishUniversity StudentsWorking Adults
B22
252 문장
Memory is crazy expensive so I made my own…
Business EnglishUniversity StudentsWorking Adults
이 레슨의 어휘와 말하기 포인트
이 말하기 레슨은 영상 “How do microSD Cards Store 2 TB in such a TINY space?”을(를) 바탕으로 합니다. 가장 자주 반복되는 단어는 다음과 같습니다: die, layer, cell, silicon, flash. 이 영상에는 섀도잉할 문장 11개와 단어 921개가 있습니다. 말하는 구간의 길이는 6:06입니다. 화자는 분당 약 151단어로, 일상 대화에 가까운 자연스러운 속도로 말합니다. 영어에서 가장 많이 쓰이는 3,000단어에 속하는 단어가 73%뿐이라 어휘가 어려운 편입니다. 전체 11문장 중 2문장이 질문이어서 의문문 억양과 짧은 대답을 연습하기에 좋습니다.
이 영상의 핵심 어휘
영상에 나오는 익혀 둘 만한 단어 15개를 발음, 뜻과 함께 정리했습니다.
| 단어 | 발음 | 뜻 |
|---|---|---|
| layer 명사 | /ˈleɪ̯ɚ/ | 층 |
| stack 명사 | /stæk/ | 무더기 |
| thin 형용사 | /ˈθɪn/ | 가늘다, 얇다 |
| silicon 명사 | /ˈsɪləˌkɑn/ | 규소, 실리콘 |
| wire 명사 | /ˈwaɪɚ/ | 철사 |
| trap 명사 | /tɹæp/ | 덫, 올가미 |
| chip 명사 | /t͡ʃɪp/ | 칩 |
| spectrum 명사 | /ˈspɛktɹəm/ | 스펙트럼, 분광 |
| connect 동사 | /kəˈnɛkt/ | 잇다, 연결하다 |
| semiconductor 명사 | /ˌsɛmikənˈdʌktə/ | 반도체 |
| package 명사 | /ˈpæk.ɪd͡ʒ/ | 짐, 꾸러미 |
| thick 형용사 | /θɪk/ | 두껍다 |
| deck 명사 | /ˈdɛk/ | 갑판 |
| seal 명사 | /siːl/ | 인장 |
| vertical 형용사 | /ˈvɝ.tɪ.kəl/ | 수직의 |
주의할 발음
- “th” 소리: thin /ˈθɪn/, thick /θɪk/, thickness /ˈθɪknəs/, beneath /bɪˈniːθ/, thoroughly /ˈθʌɹ.ə.li/
- “sh”와 “zh” 소리: flash /flæʃ/, dimensional /daɪˈmɛn.ʃə.nəl/, shell /ʃɛl/, artificial /ˌɑː.tɪˈfɪʃ.əl/, subscription /səbˈskɹɪpʃən/
- 긴 단어 — 강세 위치에 주의: semiconductor /ˌsɛmikənˈdʌktə/, incredibly /ɪŋˈkɹɛdɪbli/, dimensional /daɪˈmɛn.ʃə.nəl/, ordinary /ˈɔɹdɪnɛɹi/, artificial /ˌɑː.tɪˈfɪʃ.əl/
한국어 화자가 어려워하는 소리:
- /f/ — ㅍ(/p/)으로 바꾸지 말고 윗니를 아랫입술에 대기: flash /flæʃ/, offset /ˈɔf.sɛt/, format /ˈfɔːɹ.mæt/, roughly /ˈɹʌf.li/, physically /ˈfɪz.ɪ.kli/
- /v/ — ㅂ(/b/)과 구별하기: marvel /ˈmɑɹvəl/, vertical /ˈvɝ.tɪ.kəl/, protective /pɹəˈtɛk.tɪv/, dive /daɪv/
- /z/ — ㅈ이 아니라 성대를 울리는 /s/: zoom /zuːm/, physically /ˈfɪz.ɪ.kli/, deposit /dɪˈpɑ.zɪt/, journalism /ˈd͡ʒɝnl̩ˌɪzəm/, expose /ɪkˈspoʊz/
이 영상으로 연습하는 방법
- 먼저 말하지 않고 영상을 끝까지 듣고 모르는 단어를 적어 둡니다.
- 0.75배속으로 한 문장씩 섀도잉을 시작하고, 익숙해지면 보통 속도로 돌아갑니다.
- 자신의 목소리를 녹음해 원본과 비교하고, layer, stack, thin 같은 단어에 특히 주의합니다.
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.