I'm repairing an LCD display and metallic tape is used in several
places, as shown in these photos marked "sticky foil":
http://www.laptoprepair101.com/lapto...ght-ccfl-lamp/

There are several types of "metallic tape" or "aluminum tape" in the
market, but I'm not sure what kind of characteristics I'm looking for,
and I really don't know what the LCD display needs it for anyway
-reducing electromagnetic and radio interference and taking away heat?

I first thought the tape should be electrical conductive, but using a
continuity testing function in a multimeter this seems not to be the
case. So what am I looking for?
Will this do?:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=110254391809

It is an insulated metallic tape. Both outside surfaces are normaly not
conductive. The idea of this tape is to shield from electrical
interference of which is mostly RF.

When servicing LCD screens and not replacing this tape, I found that at
times there were interference problems. This is why the manufactures
went to the extra expense to use this type of tape.

--

JANA
_____


"NoSp" wrote in message
...
I'm repairing an LCD display and metallic tape is used in several
places, as shown in these photos marked "sticky foil":
http://www.laptoprepair101.com/lapto...ght-ccfl-lamp/

There are several types of "metallic tape" or "aluminum tape" in the
market, but I'm not sure what kind of characteristics I'm looking for,
and I really don't know what the LCD display needs it for anyway
-reducing electromagnetic and radio interference and taking away heat?

I first thought the tape should be electrical conductive, but using a
continuity testing function in a multimeter this seems not to be the
case. So what am I looking for?
Will this do?:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=110254391809

JANA wrote:

When servicing LCD screens and not replacing this tape, I found that at
times there were interference problems. This is why the manufactures
went to the extra expense to use this type of tape.

What kind of intereference?
Problems with wireless networking on a laptop?
I was under the impression that the tape was used to prevent the LCD
from overheating as well, but leaving it out won't cause any actual
physical damage then?

NoSp wrote in :

JANA wrote:

When servicing LCD screens and not replacing this tape, I found that at
times there were interference problems. This is why the manufactures
went to the extra expense to use this type of tape.

What kind of intereference?
Problems with wireless networking on a laptop?

You might cause interference with nearby shortwave radio equipment and even
with police and fire department or aircraft navigation equipment.
You need to be cautious about removing anything related to reducing Radio
Frequency Interference.

You could probably stick down some aluminum foil using double-stick clear
tape. Put a layer of clear tape on top if you want to insulate it as the
original apparently was.

I was under the impression that the tape was used to prevent the LCD
from overheating as well

You might be right. I wouldn't have guessed that but it may have some such
effect.

, but leaving it out won't cause any actual
physical damage then?

I would not leave it out. I would replace it with something as close as
possible to the original.



--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

remove ch100-5 to avoid spam trap

If you remove the metal tape, and not put it back, you can cause
interference internally in the monitor, the computer near to it, with
public service communications in the area, and possibly with other
external devices.

Many of the electronics parts suppliers that supply parts for
communications systems also sell insulated metal shielding tape. You can
also go to a hardware store and buy metal tape, but it must be surface
insulated for safety issues. You don't want such a large area of
conductive metal being exposed in case something touches it, or it
touches the circuit board or other parts.

Whatever metal you use for shielding, it must be properly grounded to
have the effect. If not, it will become an antenna and even worsen the
emitted radiation. In some cases we found the length and width of the
metal to also have an effect on the characteristics of its shielding
effect. This can be seen with a spectrum analyser using an antenna
probe.

--

Jerry G.


"NoSp" wrote in message
...
JANA wrote:

When servicing LCD screens and not replacing this tape, I found that
at
times there were interference problems. This is why the manufactures
went to the extra expense to use this type of tape.

What kind of intereference?
Problems with wireless networking on a laptop?
I was under the impression that the tape was used to prevent the LCD
from overheating as well, but leaving it out won't cause any actual
physical damage then?

Jerry G. wrote:

You can
also go to a hardware store and buy metal tape, but it must be surface
insulated for safety issues.

I've just purchased a roll of "aluminum tape" at a local hardware store.
Didn't cost much. They had a multimeter at the store and I got to check
that the outer surface is conductive while the inner surface (the sticky
side) doesn't conduct electricity.
Its acrylic glue surface is protected against moisture, UV, heat and
aging and can stand temperatures up to 120 degrees C for short periods
of time.
The store had no idea if it could be used for shielding electronics (I
don't even know if they understood what I meant).

Does that sound like something I can use, or do I need to look for
something which is specifically named "shielding tape" or similar?

NoSp wrote:
Jerry G. wrote:

You can also go to a hardware store and buy metal tape, but it must be
surface insulated for safety issues.

I've just purchased a roll of "aluminum tape" at a local hardware store.
Didn't cost much. They had a multimeter at the store and I got to check
that the outer surface is conductive while the inner surface (the sticky
side) doesn't conduct electricity.
Its acrylic glue surface is protected against moisture, UV, heat and
aging and can stand temperatures up to 120 degrees C for short periods
of time.
The store had no idea if it could be used for shielding electronics (I
don't even know if they understood what I meant).

Does that sound like something I can use, or do I need to look for
something which is specifically named "shielding tape" or similar?


That stuff should be fine, give it a go.

"James Sweet" wrote in message
newsRB_j.5674$0R.3256@trndny05...

NoSp wrote:
Jerry G. wrote:

You can also go to a hardware store and buy metal tape, but it must be
surface insulated for safety issues.

I've just purchased a roll of "aluminum tape" at a local hardware store.
Didn't cost much. They had a multimeter at the store and I got to check
that the outer surface is conductive while the inner surface (the sticky
side) doesn't conduct electricity.
Its acrylic glue surface is protected against moisture, UV, heat and
aging and can stand temperatures up to 120 degrees C for short periods of
time.
The store had no idea if it could be used for shielding electronics (I
don't even know if they understood what I meant).

Does that sound like something I can use, or do I need to look for
something which is specifically named "shielding tape" or similar?


That stuff should be fine, give it a go.

It will be fine and should work without it as well.

Mike