1. A method of manufacturing a head slider, comprising the steps of:
forming a magnetizable layer on a surface of a substrate wafer having a thickness greater than a length of the slider;
cutting said wafer into a plurality of raw bars after forming said layer while said thickness of said wafer is still greater than said length of the slider;
supporting said plurality of raw bars by a supporting jig;
arranging dummy sections of said plurality of raw bars in a single direction;
forming air bearing surface patterns on air bearing surface faces of said plurality of raw bars by photolithography; and
removing said dummy sections from said plurality of raw bars after forming said air bearing surface patterns.
2. The method according to claim 1, wherein said plurality of raw bars have thicknesses greater than a length of said slider, and are supported by said supporting jig in a machining step.
3. The method according to claim 1, wherein said dummy sections of said plurality of raw bars are arranged on one side in said supporting jig.
4. The method according to claim 1, further comprising the step of cutting at least one of said plurality of raw bars so as to form the slider.
5. The method according to claim 1, further comprising the step of removing the dummy sections before cutting into at least one of said plurality of raw bars.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-23. (canceled)
24. A multi-layered thermoformed food tray comprising first, second, and third layers heat-set into a rigid, dimensionally stable article having a bottom portion and a flange portion, wherein the first, second, and third layers comprise:
a first polymeric layer comprising an alkylene terephthalate or naphthalate polymer, the first polymeric layer containing up to about 30 wt % mineral filler;
a second intermediate layer comprising a glycidyl or maleic functional co-polymer of ethylene or ter-polymer of ethylene and an acrylate, or both; and
a third polymeric layer comprising a substantially non-polar thermoplastic.
25. The food tray of claim 24 wherein the first layer comprises a blend of (i) virgin polymer and (ii) reprocessed polymeric materials from the first, second, and third layers.
26. The food tray of claim 24 wherein said first polymeric layer is selected from the group consisting of PET, PEN, PETG, PCT, PCTA, PBT, PTT, and mixtures thereof, and comprises one or more linear or branched homo-polymers, co-polymers, reprocessed polymers, recycled polymers, or a mixture thereof.
27. The food tray of claim 24 wherein said second intermediate layer is selected from the group consisting of ethyleneglycidyl methacrylate co-polymer, ethylenemaleic anhydride co-polymer, ethyleneglycidyl methacrylatemethacrylate ter-polymer, ethyleneglycidyl methacrylateethylacrylate ter-polymer, ethyleneglycidyl methacrylatebutylacrylate ter-polymer, ethyleneglycidyl methacrylateethylhexyl acrylate ter-polymer, ethylenemaleic anhydridemethacrylate ter-polymer, ethylenemaleic anhydrideethylacrylate ter-polymer, ethylenemaleic anhydridebutylacrylate ter-polymer, ethylenemaleic anhydrideethylhexyl acrylate ter-polymer, and mixtures thereof.
28. The food tray of claim 27 wherein said second intermediate layer comprises a grafted co-polymer or ter-polymer.
29. The food tray of claim 27 wherein said second intermediate layer comprises a blend of (i) said co-polymer or ter-polymer and (ii) a co-polymer of ethylene and an acrylate.
30. The food tray of claim 27 wherein said second intermediate layer comprises a blend of (i) said co-polymer or ter-polymer and (ii) polyethylene or co-polymers of ethylene and an alpha olefin.
31. The food tray of claim 24 wherein said third polymeric layer is a substantially non-polar polyolefin.
32. The food tray of claim 24 wherein said first polymeric layer is dimensionally distorted when the food tray is filled with food and is exposed to microwave radiation.
33. The food tray of claim 24 wherein said first polymeric layer is heat set and wherein said food tray is suitable for cooking in a microwave oven.
34. The food tray of claim 24 wherein said food tray contains foodstuff and is sealed with an elastic polyolefin-based lidding stock using modified atmosphere packaging.
35. A multi-layered thermoformed microwavable food tray comprising first, second, and third layers heat-set into a rigid article which is dimensionally stable at elevated temperatures encountered in cooking applications, the article having a bottom portion and a flange portion, wherein the first, second, and third layers comprise:
a first polymeric layer comprising polyethylene terephthalate, the first polymeric layer containing up to about 30 wt % mineral filler;
a second intermediate layer selected from the group consisting of ethyleneglycidyl methacrylate co-polymer, ethylenemaleic anhydride co-polymer, ethyleneglycidyl methacrylatemethacrylate ter-polymer, ethyleneglycidyl methacrylateethylacrylate ter-polymer, ethyleneglycidyl methacrylatebutylacrylate ter-polymer, ethyleneglycidyl methacrylateethylhexylacrylate ter-polymer, ethylenemaleic anhydridemethacrylate ter-polymer, ethylenemaleic anhydrideethylacrylate ter-polymer, ethylenemaleic anhydridebutylacrylate ter-polymer, ethylenemaleic anhydrideethylhexylacrylate ter-polymer, and mixtures thereof; and
a third polymeric layer comprising a substantially non-polar polyolefin;
wherein the first layer comprises a blend of (i) virgin polymer and (ii) reprocessed polymeric materials from the first, second, and third layers.
36. The multi-layered thermoformed microwavable food tray of claim 35 wherein:
said first polymeric layer has an average thickness of from about 5 to about 35 mils;
wherein said second intermediate layer has an average thickness of from about 0.1 to about 2 mils;
wherein said third polymeric layer has an average thickness of from about 1 to about 5 mils; and
wherein said container has an area stretch ratio of from about 1.5:1 to about 3:1.