July 2012
Intermediate to advanced
360 pages
11h 50m
English
Content preview from Green Electronics Manufacturing
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202 Green Electronics Manufacturing
have the experience, tools are needed to assess the vibration fatigue life of
BGA packages during early design stages so as not to wait for product quali-
cation testing, or eld returns, to determine if a problem exists.
=
π
∗
ρ
∗++
f
D
aa
bb
3
.75
21
2
n
42
24
(9.1)
=
−υ
D
Eh*
12 *(
1)
3
2
(9.2)
Equation (9.1) shows that the rst mode natural frequency is calculated
based on the plate stiffness D, the density (ρ), the length (a), and width (b).
Equation (9.2) shows that the plate stiffness is calculated based on Young’s
Modulus (E), thickness (h), and Poisson’s ratio (υ). The second equation is
to solve for the displacement ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.