ZHCSGI8A April 2017 – October 2021 ADC12D1620QML-SP
PRODUCTION DATA
Proper thermal profile is required to establish re-flow under the package and ensure all joints meet profile specifications.
RANGE UP | PEAK TEMPERATURE (TPK) | MAXIMUM PEAK TEMPERATURE | RAMP DOWN |
---|---|---|---|
≤ 4°C/sec | 210°C ≤ tPK ≤ 215°C | ≤ 220°C | ≤ 5°C/sec |
The 220°C peak temperature is driven by the requirement to limit the dissolution of lead from the high-melt pin to the eutectic solder. Too much lead increases the effective melting point of the board-side joint and makes it much more difficult to remove the device if module rework is required.
Cool-down rates and methods affect CCGA assemble yield and reliability. Picking up boards or opening the oven while solder joints are in molten state can disturb the solder joint. Do not pick up boards until the solder joints have fully solidified. Board warping may potentially cause CCGA lifting off pads during cooling and this condition can also cause pin cracking when severe. This warping is a result of a high differential cooling rate between the top and bottom of the board. Both conditions can be prevented by using even top and bottom cooling.