ALD coatings

OLED devices are sensitive to moisture

• True

• False

What does WVTR mean

• Water Vapour Transfussion Rate

• Window Vapour Transfussion Rate

• Water Vapor Transmission Rate

• Water Vapour Translation Rate

Choose answer which is not true.

These devices can use the ALD moisture barrier on wafer-level:

• OLED, MEMS, LED, power semiconductors

• CMOS, MEMS, RF, LED

• RF, LED, OLED, CMOS

• OLED, WVTR, MEMS, LED

What was the problem of LED manufacturers?

• short lifetime of the product

• chips were not meeting electrical specification

• oxidation of chips was to low

• chips were to small to apply coatings

Wafer-level coating barriers are protecting side-walls of the chips

• True

• False

Highly Accelerated Stress Test (HAST) contains:

• high-acid exposure

• high-humidity exposure

• low-temperature exposure

• short-term exposure

ALD window referes to:

• deposition time

• deposition temperature

• deposition flow rate

• deposition cycles

What is false in case of atomic layer deposition

• layer by layer deposition

• low deposition temperatures

• short deposition time

• long deposition time

Catalysts are used in ALD

• True

• False

To perform ALD process, we need at least:

• 1 precursor

• 2 precursors

• 3 precursors

• 4 precursors