Bissoy.com
Doctors Medicines MCQs Q&A

The etching rate of silicon wafers under light illumination is much slower than under dark conditions.

The etching rate of silicon wafers under light illumination is much slower than under dark conditions. Correct Answer False

The etching rate of p- and n-type silicon wafers under room light illumination is about 0.05 times faster than under dark conditions. This difference becomes even higher (i.e. 150 times faster) when 20 W illumination is used.

Related Questions

If Price of wafers is increased by 10%, Krishna could buy 2 kg less wafers in Rs. 440. Now Krishna purchased 5 kg wafers for his birthday, then find how much more money paid by Krishna.
Illumination of light in metal-assisted etching of silicon affects the etching rate.
Porous silicon structures are produced by electrochemical etching of silicon wafers in organic solutions of_____
Which of the following is the correct sequence in the development of geographic thought? (A) Greeks, Roman, Arabs, Dark Ages (B) Greeks, Roman, Dark Ages, Arabs (C) Roman, Greeks, Arabs, Dark Ages (D) Arabs, Greeks, Roman, Dark Ages  (E) Greeks, Dark ages, Roman, Arabs Choose the correct answer from the options given below:
Silicon devices can be employed for a higher temperature limit (190°C to 200°C) as compared to germanium devices (85°C to 100°C). With respect to this, which of the following are incorrect? 1) Higher resistivity of silicon 2) Higher gap energy of silicon 3) Lower intrinsic concentration of silicon 4) Use of silicon devices in high-power applications Select the correct answer using the code given below:
The illumination of a bulb varies inversely as the square of the distance . If the illumination is 6 lux at a distance of 5 meters whet is illumination at a distance of 3 meters?
A, B, C, D and E participate in a running race. D moves faster than E by rate of 2 km/hr but slower than C at a rate of 1 km/hr. B moves faster than C by a rate of 1 km/hr and slower than A by 1 km/hr. What is the relative speed of the winner with respect to the person who completes at last (in km/hr)?
Read the following passage carefully and choose the most appropriate answer to the question out of the four alternatives.
The human eye is a complex part of the body that is used for seeing. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he really sees is the light reflected from the object. This reflected light passes through the lens and falls on the retina of the eye. Here the light induces nerve impulses that travel through the optic nerve to the brain and then over other nerves to muscles and glands.
The eye is similar to a television camera. Both the eye and the television camera convert light energy to electrical energy. The eye converts light to nerve impulses that are interpreted by the brain as the sense perception called sight. A television camera converts light to electronic signals that are broadcast and transformed into light images in a television receiver. It is wonderful that human eyes blink an average of once every six seconds. This washes the eye with the salty secretion from the tear or lachrymal glands. Each tear gland is about the size and shape of an almond. These glands are situated behind the upper eyelid at the outer corner of the eye. After passing over the eye, the liquid from the gland is drained into the nose through the tear duct at the inner corner of the eye. The sense perception that the brain releases after the eye converts light to nerve impulses is known as
To etch the surface of silicon wafers at specific positions by metal-assisted etching, nano-porous anodic alumina (NAA) mask technique is used.
Read the following passage carefully and choose the most appropriate answer to the question out of the four alternatives.
The human eye is a complex part of the body that is used for seeing. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he really sees is the light reflected from the object. This reflected light passes through the lens and falls on the retina of the eye. Here the light induces nerve impulses that travel through the optic nerve to the brain and then over other nerves to muscles and glands.
The eye is similar to a television camera. Both the eye and the television camera convert light energy to electrical energy. The eye converts light to nerve impulses that are interpreted by the brain as the sense perception called sight. A television camera converts light to electronic signals that are broadcast and transformed into light images in a television receiver. It is wonderful that human eyes blink an average of once every six seconds. This washes the eye with the salty secretion from the tear or lachrymal glands. Each tear gland is about the size and shape of an almond. These glands are situated behind the upper eyelid at the outer corner of the eye. After passing over the eye, the liquid from the gland is drained into the nose through the tear duct at the inner corner of the eye. The average rate of blinking of an eye is