Thermal print head

A thermal print head, comprising:

• a heat resistor, including a heat portion;
• a first electrode, connected to the heat resistor;
• and
• a second electrode, connected to the heat resistor, wherein
• the heat portion is a portion of the heat resistor sandwiched between the first electrode and the second electrode,
• the first electrode includes a base portion and an extension portion extending from the base portion to the heat resistor,
• the extension portion includes a first strip portion and a second strip portion connected to the first strip portion and the base portion,
• the first strip portion is in contact with the heat resistor and overlaps the second electrode along a lengthwise direction of the heat resistor,
• the second strip portion does not overlap with the second electrode along the lengthwise direction of the heat resistor,
• a first width of the first strip portion is less than a second width of the base portion at a conjunction between the second strip portion and the base portion,
• a third width of the second strip portion at the conjunction is less than the second width,
• a width of at least a portion of the second strip portion is equal to or less than the first width, and
• a length of the second strip portion is greater than a half of a difference between a length of the first strip portion and a width of the heat resistor.