Deposition burner and method for the manufacture thereof, use of the deposition burner and method for the production of a quartz glass body by using the deposition burner

A method for manufacturing a deposition burner for use in the manufacture of synthetic quartz glass, the method comprising the following steps:

• (a) providing a start cylinder of quartz glass that is mechanically provided with longitudinal bores;
• (b) elongating the start cylinder so as to form a burner strand, wherein the longitudinal bores form elongated channels extending in parallel with one another in the burner strand;
• (c) cutting the burner strand into pieces in the form of cylindrical quartz glass blocks, wherein, in each quartz glass block, the elongated channels form passage lines extending in parallel with a central axis of the quartz glass block;
• and
• (d) manufacturing the deposition burner using one of the quartz glass blocks as a burner head, said burner head having a proximal end and a distal end, the passage lines being configured to supply process media from the distal end to the proximal end of the burner head;
• and
• wherein the manufacturing of the deposition burner comprises laterally recessing the distal end of the burner head by mechanical grinding of the quartz glass block so that the burner head has a surrounding step such that the passage lines that are located at a first distance from the central axis of the quartz glass block all terminate at said surrounding step.