Semiconductor structure and forming method thereof

A method of forming a semiconductor structure includes providing a semiconductor substrate having a source/drain feature and a gate structure formed thereon; forming an interlayer dielectric layer on the semiconductor substrate; patterning the interlayer dielectric layer to form a trench to expose the source/drain feature within the trench; forming a dielectric liner on the sidewall of the trench; filling a metal layer in the groove; recessing a portion of the metal layer in the trench to form a recess in the metal layer; and refilling the groove with a dielectric material layer. The embodiment of the invention also provides a semiconductor structure. 形成半导体结构的方法包括提供其上形成有源极/漏极部件和栅极结构的半导体衬底；在半导体衬底上形成层间介电层；图案化层间介电层以形成沟槽来将源极/漏极部件暴露在沟槽内；在沟槽的侧壁上形成介电衬垫；在沟槽中填充金属层；使沟槽中的金属层的部分凹进，从而在金属层中形成凹槽；以及在凹槽中再填充介电材料层。本发明的实施例还提供了半导体结构。