Patent ID: 7395823

Claim:
A method for producing F 2 and NF 3 cleaning gases for semiconductor chambers, said method comprising: producing an NH 4 F(HF) x solution; providing said NH 4 F(HF) x solution to an HF production unit; heating said NH 4 F(HF) x solution in said HF production unit to produce an NH 4 F(HF) x feed stream and an HF feed stream; providing said HF feed stream to an F 2 production unit to produce a crude F 2 stream; providing said crude F 2 stream to an F 2 purification unit to produce a purified F 2 product stream; providing said NH 4 F(HF) x feed stream and a portion of said crude or said purified F 2 stream to an NF 3 production unit to produce a crude NF 3 stream; and providing said crude NF 3 stream to an NF 3 purification unit to produce a purified NF 3 product stream.