Head gimbal assembly and magnetic disk device with the same with slider having intermittent capture grooves

A magnetic disk device comprising:

• a disk-shaped recording medium which is rotatably provided;
• a head gimbal assembly which comprises a suspension, a gimbal portion provided in the suspension, and a magnetic head supported on the gimbal portion,
• wherein a slider which comprises an air bearing surface including a pair of side edges, a pair of side surfaces along the pair of side edges of the air bearing surface, a leading-side end surface, and a trailing-side end surface, and a head portion provided in the slider and configured to write and read data, and
• wherein the slider comprises a leading-side step portion on a leading-side end portion of the air bearing surface, a trailing-side step portion on a trailing-side end portion of the air bearing surface and including the head portion, a deep groove which is formed between the leading-side step portion and the trailing-side step portion and is open to the air bearing surface and the pair of side surfaces, and at least a pair of capturing grooves which is formed on a bottom surface of the deep groove, and the pair of capturing grooves is provided along the pair of side surfaces and is disposed with a gap from the pair of side surfaces, each of the capturing grooves intermittently extends from the trailing-side step portion to the leading-side step portion.