Systems and methods for drilling holes in printed circuit boards
AssigneeTri-Star Laminates, Inc.
InventorsSEAN MATTHEW REDFERN, JAMES JOSEPH MILLER, PAUL RONALD ST. JOHN
Life of this patent
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Abstract
An entry sheet comprising polymer material for drilling printed circuit boards is provided. The entry sheet is suitable for use with a broad range of diameters, including commonly available drill diameters. The entry sheet comprises an adhesive epoxy configured to, among others, resist drill deflection, resist mechanical damage, and reduce to dust such that the entry sheet may increase drilling accuracy, protect printed circuit board from damage, minimize entry burrs, and may addresses other issues such as fliers, bird nesting, and the like.
Claims18
An entry sheet for drilling circuit boards, the entry sheet comprising:
- a substrate layer having a thickness of about 6 mils or less;
- and
- an entry sheet component provided over the substrate layer, wherein the entry sheet component has a thickness of about 6 mils or less.
An entry sheet for drilling circuit boards, the entry sheet comprising:
- an entry sheet component configured to be used with drill diameters in the range of about 6.7 mm or less, wherein the entry sheet component comprises an adhesive.
Dependencies are inferred from the claim text.