Patent ID: 6971937

Claim:
A method for making a spark plug for an internal combustion engine, comprising the following steps: providing at least two electrodes ( 9 , 11 ), wherein a first one of said at least two electrodes is at least one middle electrode ( 11 ) and another electrode of the at least two electrodes is at least one ground electrode ( 9 ); forming a spark gap ( 13 ) between the at least one ground electrode ( 9 ) and the at least one middle electrode ( 11 ), wherein each of the at least two electrodes ( 9 , 11 ) has an electrode base body ( 93 , 113 ), wherein at least one electrode has a region ( 95 , 115 ) that is highly resistant to electrode erosion and that forms at least a part of an end face of the electrode ( 97 , 117 ), oriented toward the spark gap, wherein the highly electrode-erosion-resistant region ( 95 , 115 ) comprises an alloy which has at least the elements iridium, platinum and nickel; and directly bonding the highly electrode-erosion-resistant region to the electrode base body by laser welding, with no intermediate stress-releasing layer.