question about depopulating boards

[archeonist]

Hi Guys, I'm a bit concerned about depopulating boards. I noticed that there is beryllium in some computer components, but I can't find the desired information. I know some pins are made of a beryllium copper alloy so I won't cut these. Some parts of the cpu housing are also beryllium and berylliumoxide is present in some transistors.

My questions are: is there beryllium present on the inside of RAM-chips? And the ceramics of cpu's? What are they made of? When I depopulte RAM stics, I cut the fingers using a big paper cutter, I do this outside and I wear a mask (a small one :lol: ) I also cut the chips off, but what particels get airborne when doing this??? Then again after we insinerate the chips, we crush them, but is it 100% sure that the isn't any beryllium oxide in the ceramics?

Please help 8)

 

[g_axelsson]

There's no beryllium inside CPU:s or RAM sticks.

Some CPU holders could have gold plated beryllium copper pins.

Beryllium in copper alloys is used when you want a strong, hard and flexible metal as the springy contacts under pinless CPU:s. In pins and ISA/PCI/RAM.... sockets the normal alloy is brass or phosphorus bronze.
Beryllium oxide as a ceramic is used for high temperatures and where a lot of heat needs to be diverted by a ceramic package. Most common in transistors for radio transmitters.

Göran

 

[archeonist]

There's no beryllium inside CPU:s or RAM sticks.

Some CPU holders could have gold plated beryllium copper pins.

Beryllium in copper alloys is used when you want a strong, hard and flexible metal as the springy contacts under pinless CPU:s. In pins and ISA/PCI/RAM.... sockets the normal alloy is brass or phosphorus bronze.
Beryllium oxide as a ceramic is used for high temperatures and where a lot of heat needs to be diverted by a ceramic package. Most common in transistors for radio transmitters.

Göran

Well thanks Göran! Now I will just carry on depopulating the boards 8)

 

[kane333]

Below is a link to the MSDS Sheet for Beryllium Copper.

http://berylliumcopper.co.kr/msds_cbma.pdf