NOVELTY - The method involves accelerating gas cluster ions to form an accelerated gas cluster ion beam along a beam path within a reduced pressure chamber. Fragmentation and dissociation of a portion of accelerated gas cluster ions along the beam path are promoted prior to irradiating the surface. Charged particles are removed from the beam path to form an accelerated neutral beam along the beam path in the reduced pressure chamber. An object is held in the beam path. A portion of the surface of the object is treated by irradiating the object with the accelerated neutral beam.    USE - Method for treating a surface e.g. semiconductor material surface, thin film battery structure such as anode layer battery structure, solid electrolyte layer battery structure, cathode layer battery structure and lithium thin film battery structure, and optical device surface (all claimed), of an object such as an implantable medical device e.g. coronary stent and orthopedic prosthesis, for treating a patient.    ADVANTAGE - The method enables processing a wide variety of materials With a Neutral Beam without necessity of providing a source of target neutralizing electrons to prevent work-piece charging due to charge transported to the work-piece by an ionized beam. The method enables providing favorable medical or physiological outcome of the implantation of the medical device. The method enables controlling deflection plates, so that gas cluster ion beam passes without deflection, thus allowing the full gas cluster ion beam to irradiate the work-piece and a work-piece holder. The method improves adhesive bonding properties of the surface of implantable medical device.    DETAILED DESCRIPTION - The portion of the surface is applied with adhesive. The adhesive comprises poly methyl methacrylate cement, poly methyl methacrylate bone cement or an epoxy cement. The surface comprises semiconductor material, thin film battery structure e.g. anode layer, solid electrolyte layer and cathode layer, or optical device. The thin film battery structure is a lithium thin film battery. INDEPENDENT CLAIMS are also included for the following:    (1) an adhesive bond    (2) a method for improving a surface of an object    (3) an article for improving a surface of an object.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of apparatus for treating a surface of an object to improve adhesive bonding properties of a surface of implantable medical device and uses electrostatic deflection plates to separate charged and uncharged beam components.    Gas storage cylinder (111)    Condensable source gases (112)    Gas metering valve (113)    Feed tube (114)    Gas skimmer aperture (120)