Shadowing Practice: How do microSD Cards Store 2 TB in such a TINY space? - Learn English Speaking with Video
Creando lección...
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.
📺 Mismo canal
C11
The Engineering that Runs the Digital World 🛠️⚙️💻 How do CPUs Work?
Daily ConversationUniversity StudentsWorking Adults
C19
How are Microchips Made? 🖥️🛠️ CPU Manufacturing Process Steps
Business EnglishUniversity StudentsWorking Adults
C1How does Tap to Pay Work?
Daily ConversationUniversity StudentsWorking Adults
C1How do SSDs Work? | How does your Smartphone store data? | Insanely Complex Nanoscopic Structures!
Business EnglishUniversity StudentsWorking Adults
✨ Recomendar Video
C12
20 oraciones
The Semiconductor Production Process Explained Clearly
Daily ConversationUniversity StudentsWorking Adults
C1231 oraciones
Redis Crash Course - the What, Why and How to use Redis as your primary database
Daily ConversationUniversity StudentsWorking Adults
C11
27 oraciones
You are wasting memory
Daily ConversationUniversity StudentsWorking Adults
C18
14 oraciones
Would You Upload Your Mind?
Daily ConversationUniversity StudentsWorking Adults
C11
41 oraciones
Making a 360° Controller Smaller than a Penny!
Daily ConversationUniversity StudentsWorking Adults
C12
283 oraciones
Why Memory Prices Are Crazy High
Daily ConversationUniversity StudentsWorking Adults
C18
156 oraciones
How Quantum Batteries Break Every Rule of Charging
Daily ConversationUniversity StudentsWorking Adults
C12
53 oraciones
Cache Systems Every Developer Should Know
Daily ConversationUniversity StudentsWorking Adults
C11
77 oraciones
The Secret Sauce Behind NoSQL: LSM Tree
Daily ConversationUniversity StudentsWorking Adults
B21
375 oraciones
Configure storage accounts | AZ-104 | Episode 16
Daily ConversationUniversity StudentsWorking Adults
C14
239 oraciones
My 4.9-Star iOS App Is Actually a Website: Here’s How I Built It
Daily ConversationUniversity StudentsWorking Adults
C11
75 oraciones
Video
Daily ConversationUniversity StudentsWorking Adults
Vocabulario y notas de pronunciación para esta lección
Esta lección de conversación se basa en el vídeo “How do microSD Cards Store 2 TB in such a TINY space?”. Las palabras que más se repiten: die, layer, cell, silicon, flash. Este vídeo tiene 11 frases y 921 palabras para practicar shadowing. La parte hablada dura 6:06. El hablante habla a un ritmo natural de unas 151 palabras por minuto, cercano a una conversación cotidiana. Solo el 73 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente. 2 de sus 11 frases son preguntas, así que sirve para practicar la entonación de las preguntas y las respuestas cortas.
Vocabulario clave de este vídeo
15 palabras del vídeo que vale la pena aprender, con su pronunciación y significado:
| Palabra | Pronunciación | Significado |
|---|---|---|
| layer sustantivo | /ˈleɪ̯ɚ/ | capa, tongada |
| stack sustantivo | /stæk/ | pila, montón |
| flash verbo | /flæʃ/ | destellar, flashear |
| silicon sustantivo | /ˈsɪləˌkɑn/ | silicio |
| wire sustantivo | /ˈwaɪɚ/ | alambre, hilo |
| trap sustantivo | /tɹæp/ | trampa, cepo |
| chip sustantivo | /t͡ʃɪp/ | astilla, cepa |
| spectrum sustantivo | /ˈspɛktɹəm/ | espectro |
| connect verbo | /kəˈnɛkt/ | conectar, empalmar |
| array sustantivo | /əˈɹeɪ/ | atavío, galas |
| semiconductor sustantivo | /ˌsɛmikənˈdʌktə/ | semiconductor |
| package sustantivo | /ˈpæk.ɪd͡ʒ/ | paquete, kete |
| thick adjetivo | /θɪk/ | grueso, espeso |
| deck sustantivo | /ˈdɛk/ | piso, plataforma |
| incredibly adverbio | /ɪŋˈkɹɛdɪbli/ | increíblemente |
Phrasal verbs que vas a escuchar
| Palabra | Significado |
|---|---|
| break down verbo | descomponerse, averiarse |
| find out verbo | averiguar, anoticiarse |
| get off verbo | bajarse |
| step down verbo | dimitir, renunciar |
Pronunciación a tener en cuenta
- Los sonidos de “th”: thin /ˈθɪn/, thick /θɪk/, thickness /ˈθɪknəs/, beneath /bɪˈniːθ/, thoroughly /ˈθʌɹ.ə.li/
- Los sonidos de “sh” y “zh”: flash /flæʃ/, dimensional /daɪˈmɛn.ʃə.nəl/, shell /ʃɛl/, artificial /ˌɑː.tɪˈfɪʃ.əl/, subscription /səbˈskɹɪpʃən/
- Palabras largas — cuida el acento: semiconductor /ˌsɛmikənˈdʌktə/, incredibly /ɪŋˈkɹɛdɪbli/, dimensional /daɪˈmɛn.ʃə.nəl/, ordinary /ˈɔɹdɪnɛɹi/, artificial /ˌɑː.tɪˈfɪʃ.əl/
Sonidos difíciles para hispanohablantes:
- s + consonante al inicio — sin añadir una “e” delante: stack /stæk/, spectrum /ˈspɛktɹəm/, sponsor /ˈspɒn.səː/, strand /ˈstɹænd/, squeeze /skwiːz/
- /v/ — no es /b/: los dientes tocan el labio inferior: marvel /ˈmɑɹvəl/, vertical /ˈvɝ.tɪ.kəl/, protective /pɹəˈtɛk.tɪv/, dive /daɪv/
- /z/ — sonora, no /s/: zoom /zuːm/, physically /ˈfɪz.ɪ.kli/, deposit /dɪˈpɑ.zɪt/, journalism /ˈd͡ʒɝnl̩ˌɪzəm/, expose /ɪkˈspoʊz/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
- Grábate y compara con el original, prestando atención a palabras como layer, stack, flash.
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.