<s>
Laser	B-Algorithm
trimming	I-Algorithm
is	O
the	O
manufacturing	O
process	O
of	O
using	O
a	O
laser	O
to	O
adjust	O
the	O
operating	O
parameters	O
of	O
an	O
electronic	O
circuit	O
.	O
</s>
<s>
The	O
LTCC	B-Algorithm
boards	O
are	O
contacted	O
by	O
test	O
probes	O
on	O
the	O
assembly	O
side	O
and	O
trimmed	O
with	O
a	O
laser	O
beam	O
from	O
the	O
resistor	O
side	O
.	O
</s>
<s>
Therefore	O
,	O
the	O
LTCC	B-Algorithm
can	O
be	O
arranged	O
more	O
compactly	O
and	O
less	O
expensively	O
.	O
</s>
<s>
The	O
LTCC	B-Algorithm
is	O
mounted	O
in	O
the	O
contact	O
unit	O
.	O
</s>
<s>
Often	O
designers	O
use	O
potentiometers	B-Device
,	O
which	O
are	O
adjusted	O
during	O
end	O
testing	O
until	O
the	O
desired	O
function	O
of	O
the	O
circuit	O
is	O
reached	O
.	O
</s>
<s>
In	O
many	O
applications	O
,	O
the	O
end	O
user	O
of	O
the	O
product	O
would	O
prefer	O
not	O
to	O
have	O
potentiometers	B-Device
,	O
as	O
they	O
can	O
drift	O
,	O
be	O
mis-adjusted	O
or	O
develop	O
noise	O
.	O
</s>
<s>
It	O
is	O
simpler	O
to	O
substitute	O
the	O
potentiometer	B-Device
or	O
the	O
SOT	O
part	O
with	O
a	O
trimmable	O
chip	O
resistor	O
or	O
chip	O
capacitor	O
,	O
and	O
the	O
potentiometer	B-Device
adjusting	O
screwdriver	O
is	O
replaced	O
by	O
the	O
laser	B-Algorithm
trimming	I-Algorithm
.	O
</s>
<s>
The	O
achieved	O
accuracy	O
can	O
be	O
higher	O
,	O
the	O
procedure	O
can	O
be	O
automated	O
,	O
and	O
the	O
long-term	O
stability	O
is	O
better	O
than	O
with	O
potentiometers	B-Device
and	O
at	O
least	O
as	O
good	O
as	O
with	O
SOT	O
components	O
.	O
</s>
<s>
An	O
example	O
of	O
this	O
is	O
the	O
IBM	O
POWER4	B-Device
microprocessor	O
where	O
the	O
chip	O
contains	O
five	O
banks	O
of	O
cache	B-General_Concept
memory	I-General_Concept
but	O
only	O
requires	O
four	O
banks	O
for	O
full	O
operation	O
.	O
</s>
<s>
During	O
testing	O
,	O
each	O
cache	B-General_Concept
bank	O
is	O
exercised	O
.	O
</s>
<s>
This	O
built-in	O
redundancy	O
allows	O
higher	O
chip	O
yields	B-Architecture
than	O
would	O
be	O
possible	O
if	O
all	O
cache	B-General_Concept
banks	O
had	O
to	O
be	O
perfect	O
in	O
every	O
chip	O
.	O
</s>
