Injector

An injector configured to be placed in a process chamber of a batch furnace assembly for injecting a gas into said process chamber, the injector comprising an elongated, tubular housing enclosing an injection chamber, wherein the housing comprises:

• a gas inlet opening for supplying a gas from a gas source to the injection chamber;
• at least one gas supply opening for supplying the gas from the injection chamber into the process chamber;
• and a circumferential wall extending in a longitudinal direction of the housing and comprising a first lateral wall half and a second lateral wall half, both lateral wall halves substantially spanning a length of the housing in the longitudinal direction, wherein the first and second lateral wall halves are fastened to each other by means of mechanical fastening, wherein the housing further comprises a bottom cap and a top cap attachable to the first and the second lateral wall halves, wherein the bottom cap and the top cap are configured such that they provide me chanical fastening when attached to the first and the second lateral wall halves.