U.S. Philips Corporation

Wolfgang Binder-Krieglstein

Jacobus J Ruigrok

Ulrich Traxlmayr

Franciscus W Dirne

Cornelis W Sillen

A recording apparatus includes a thin film magnetic head ( ) with eight write units ( ) positioned adjacent to each other in a transversal direction (y) to write data in parallel tracks on a magnetic tape ( ). Switching arrangement has a switch (SW) to switch from a normal mode to a combination mode. In the normal mode the switch is in a first position (D ) and the switching arrangement ( ) couple a first data signal (S ) to a first write unit ( ), a second data signal (S ) to a second write unit ( ) etc., so that in the normal mode eight tracks (T -T ) are written on the tape resulting in a first track density. In the combination mode the switch is in a second position (D ) and the switching arrangement couples the first data signal (S ) to the first and second write units ( and ), the second data signal (S ) to the third and fourth write units ( and ) etc. Hence, in the combination mode, four tracks (T -T ) are written on the tape resulting in a second track density which is half the first track density. This second track density corresonds to the density of the write units of a magnetic head ( ) of an apparatus (not shown) of an older generation.

Apparatus for recording data in parallel tracks

Magnetic head comprising a magnetic core having two core limbs (1,3) formed from a ferrite, which core limbs constitute two core faces located opposite each other, at least one of said core faces having a cladding of a soft-magnetic material having a higher saturation magnetisation than the ferrite, and a non-magnetic transducing gap (11) present between the core faces and having at least one layer of a first metallic material (21) and bonded layers (23) of a second metallic material. The cladding comprises a first cladding layer (15) of an alloy based on Ni-Fe on which a second cladding layer (17) of an amorphous alloy based on Co-Ti and/or Zr and/or Hf-Nb and/or Ta is provided, while the first metallic material, chosen from the group of Mo, Ti, Cr and NiCr, is directly provided on the amorphous alloy of the cladding. (FIG. 2).

Growing community of inventors

Wien, Austria

Wolfgang Binder-Krieglstein