microfab vragen en antwoorden - Knoowy

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What are the typical length scales of “microfabrication”?

Antwoord op: What are the typical length scales of “microfabrication”? Antwoord:

• scales from >nm to <mm

Can you mention a number of advantages that are offered by engineering at reduced scales?

Antwoord op: Can you mention a number of advantages that are offered by engineering at reduced scales? Antwoord:

• Increased functionality in smaller volume
• Special small-scale effects can be used
• Highly parallel and cost effective manufacturing (high performance at low cost)
• Minimally invasive services
• Interaction/ merging with biological materials
• Increasing strength of materials in the micro
• Low material & power consumption

Can you give a number of examples of scaling laws in physics (e.g. volume versus area, magnetic force, electrostatic force, surface tension versus gravity, ...)

Antwoord op: Can you give a number of examples of scaling laws in physics (e.g. volume versus area, magnetic force, electrostatic force, surface tension versus gravity, ...) Antwoord:

• As we scale down length, surface area, volume, their corresponding forces scale down differently. (friction, van der waals, surface tension. Forces that scale with volume become less important)

Surface tension -> force from surface tension scales – L
Gravitational force scales – L^3

Reducing the length by factor 2 results in a reduction of the electromagnetic force by a factor of 16 (L^4) (faradays law)

Can you mention a number of physical effects that become more and more important as sizes are scaled down?

Antwoord op: Can you mention a number of physical effects that become more and more important as sizes are scaled down? Antwoord:

- Area, Capacitance, capacitor electric field, deformation, electrostatic force, inductance, ohmic current, Resistance, resistive power loss, shear stiffness, strength, strength to weight ratio, surface tension force, thermal conductance thermal time constant, viscous force, voltage.

Can you mention and explain a number of microfabrication methods we have available in the Microfab lab?

Antwoord op: Can you mention and explain a number of microfabrication methods we have available in the Microfab lab? Antwoord:

Advanced laser microfabrication, soft lithography, (3D) printing techniques and mechanical micromachining. (Lithography, thin films, furface treatment, soft lithography, rapid prototyping of microdevices), laser fabrication, micromilling

What, do you think, are main challenges in future developments of microfabrication methods?

Antwoord op: What, do you think, are main challenges in future developments of microfabrication methods? Antwoord:

Resolution -> As technology advances, there is a growing demand for even smaller and more intricate microfabricated structures. Achieving higher resolution and miniaturization while maintaining precision and accuracy is a significant challenge. Overcoming limitations imposed by the wavelength of light used in photolithography, which is the dominant technique in semiconductor manufacturing, is a particular concern.

Can you describe the general process of thin film deposition / lithography/ etching processes to realize a microsystems structure?

Antwoord op: Can you describe the general process of thin film deposition / lithography/ etching processes to realize a microsystems structure? Antwoord:

Thin film deposition
- Vacuum techniques
Reducing the particle density so that the mean free path for collision is long
Reducing the particle density of undesirable atoms and molecules (contaminant)
Providing a low pressure plasma environment
Providing a means for controlling gas and vapor composition

PVD
CVD
- Non-vacuum techniques
Spin coating
Screen printing

Lithography
Light on a mask above exposed photoresist. Negative resist, Positive resist

Etching
- Dry etching
- Wet etching
- Isotropic etching
- Anisotropic etching

Which main classes exist in vacuum deposition of thin films? What is the main difference?

Antwoord op: Which main classes exist in vacuum deposition of thin films? What is the main difference? Antwoord:

- Physical vapor deposition (PVD), the vapor source is a solid
- Chemical vapor deposition (CVD), the source is a chemical vapor precursor

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Vraag:

What are the typical length scales of “microfabrication”?

Vul het antwoord in:

Controleer antwoord

Antwoord:

• scales from >nm to <mm

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

Can you mention a number of advantages that are offered by engineering at reduced scales?

Vul het antwoord in:

Controleer antwoord

Antwoord:

• Increased functionality in smaller volume
• Special small-scale effects can be used
• Highly parallel and cost effective manufacturing (high performance at low cost)
• Minimally invasive services
• Interaction/ merging with biological materials
• Increasing strength of materials in the micro
• Low material & power consumption

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

Can you give a number of examples of scaling laws in physics (e.g. volume versus area, magnetic force, electrostatic force, surface tension versus gravity, ...)

Vul het antwoord in:

Controleer antwoord

Antwoord:

• As we scale down length, surface area, volume, their corresponding forces scale down differently. (friction, van der waals, surface tension. Forces that scale with volume become less important)

Surface tension -> force from surface tension scales – L
Gravitational force scales – L^3

Reducing the length by factor 2 results in a reduction of the electromagnetic force by a factor of 16 (L^4) (faradays law)

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

Can you mention a number of physical effects that become more and more important as sizes are scaled down?

Vul het antwoord in:

Controleer antwoord

Antwoord:

- Area, Capacitance, capacitor electric field, deformation, electrostatic force, inductance, ohmic current, Resistance, resistive power loss, shear stiffness, strength, strength to weight ratio, surface tension force, thermal conductance thermal time constant, viscous force, voltage.

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

Can you mention and explain a number of microfabrication methods we have available in the Microfab lab?

Vul het antwoord in:

Controleer antwoord

Antwoord:

Advanced laser microfabrication, soft lithography, (3D) printing techniques and mechanical micromachining. (Lithography, thin films, furface treatment, soft lithography, rapid prototyping of microdevices), laser fabrication, micromilling

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

What, do you think, are main challenges in future developments of microfabrication methods?

Vul het antwoord in:

Controleer antwoord

Antwoord:

Resolution -> As technology advances, there is a growing demand for even smaller and more intricate microfabricated structures. Achieving higher resolution and miniaturization while maintaining precision and accuracy is a significant challenge. Overcoming limitations imposed by the wavelength of light used in photolithography, which is the dominant technique in semiconductor manufacturing, is a particular concern.

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

Can you describe the general process of thin film deposition / lithography/ etching processes to realize a microsystems structure?

Vul het antwoord in:

Controleer antwoord

Antwoord:

Thin film deposition
- Vacuum techniques
Reducing the particle density so that the mean free path for collision is long
Reducing the particle density of undesirable atoms and molecules (contaminant)
Providing a low pressure plasma environment
Providing a means for controlling gas and vapor composition

PVD
CVD
- Non-vacuum techniques
Spin coating
Screen printing

Lithography
Light on a mask above exposed photoresist. Negative resist, Positive resist

Etching
- Dry etching
- Wet etching
- Isotropic etching
- Anisotropic etching

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Vraag:

Which main classes exist in vacuum deposition of thin films? What is the main difference?

Vul het antwoord in:

Controleer antwoord

Antwoord:

- Physical vapor deposition (PVD), the vapor source is a solid
- Chemical vapor deposition (CVD), the source is a chemical vapor precursor

Jouw antwoord:

input text value

Vraag opnieuw antwoorden

Ontgrendel alle 60 oefenvragen

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Informatie

voor mondeling micro fabrication. Vragen en antwoorden uitgewerkt. succes oke

Aantal

60 oefenvragen

Taal

Nederlands

Gemaakt op

02-07-2023

Opleiding

Universiteit / TU Eindhoven

Verkoper

1 oefenvragen gemaakt

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Beyz

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