Use of force fields by raceEdit
Lantean Personal shield emitters are able to block anything except air from passing though them and are formed skin-tight to the user's body. They can block the effects of all weapons fire and fully dampen large falls until their power cells deplete. Forcefields were also employed on the Mobile drilling platform in the event of flooding.
The Tok'ra use an advanced form of one-way forcefield to keep their prisoners inside their cells whilst allowing weapons fire to enter the cell should it be necessary. It can be used to capture someone inside but Kull Warriors have been able to pass through due to their Kull armor's energy absorbing qualities. (SG1: "Evolution, Part 1")
The Tau'ri have been able to produce a plasma force field with the specific function of acting as a temperature barrier for a matter bridge designed by Rodney McKay, but stolen by Malcolm Tunney. (SGA: "Brain Storm")
The Goa'uld used a massive forcefield to block passage to the Stargate when SGs 3, 5, 6 and 11 were sent to retrieve SG-1 from Hathor's Stargate Command mock-up. Because of its size, a huge generator was required to power it. The forcefield was deactivated when C-4 charges were remotely detonated inside the generator. (SG1: "Into the Fire")
During their mission to destroy Apophis' Battleship Jack O'Neill and Samantha Carter managed to run through the forcefields aboard the ship, due to the enhanced Atanik armbands. Carter was trapped behind a forcefield when the armbands effects began to wear off. When the C-4 package exploded and the power core was destroyed all the forcefields came down and the team managed to escape. (SG1: "Upgrades")
Kara keshs can also project a personal forcefield around a person that blocks impact with fast moving objects and energy, but allows slow moving ones through.
Anubis also utilized a forcefield as an iris for his Stargate on Tartarus. This forcefield iris was yellow in color and utilized similar to the one on Atlantis. It is possible Anubis was utilizing Ancient knowledge in doing this. This forcefield iris only allowed Kull warriors to pass unharmed as the Kull armor absorbed the energy of the forcefield. (SG1: "Evolution, Part 2")
Vanir armored exoskeletons are capable of projecting a large forcefield that can deflect bullets from Tau'ri assault rifles but will fall to sustained fire. They also possess Drilling platforms which create a type of forcefield. (SGA: "First Contact")