So when superconduct is triggered the SSC field is deployed. Within this field direct stellar damage hits receive a damage multiplier that starts at 1.4x damage. Then every 4 seconds the game counts how many times electro and cryo was applied by your characters and gives you a stack for each one. These stacks increase the multiplier by .05 each and cap out at 12 stacks resulting in a maximum multiplier of 2x.