ABC's of Ultrasonics

Transducers
High Frequency
Short Focus
Low Frequency
Long Focus
1. 1. Higher Higher resolution resolution
2. 2. Shorter Shorter focal focal lengths lengths
3. 3. Less Less penetration penetration
(Thinner (Thinner packages) packages)
1. 1. Lower Lower resolution resolution
2. 2. Longer Longer focal focal lengths lengths
3. 3. Greater Greater penetration penetration
(Thicker (Thicker packages) packages)
General
General
rules:
rules:
•
•
Ultra
Ultra
High
High
Frequency
Frequency
(200+
(200+
MHz)
MHz)
for
for
flip
flip
chips
chips
and
and
wafers.
wafers.
•
•
High
High
Frequency
Frequency
(50-75
(50-75
MHz)
MHz)
for
for
thin
thin
plastic
plastic
packages.
packages.
(110MHz-UHF)
(110MHz-UHF)
for
for
flip
flip
chips.
chips.
•
•
Low
Low
Frequency
Frequency
(15
(15
MHz)
MHz)
for
for
thicker
thicker
plastic
plastic
packages.
packages.
Copyright Sonix, Inc
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