A display device includes a display substrate including a display area and a pad region, a first pad portion including a plurality of first pad terminals, the plurality of first pad terminals being arranged in a first direction, and a printed circuit board (PCB) including a base film and a second pad portion. The second pad is electrically connected to the first pad portion. The second pad portion includes a plurality of second pad terminals electrically connected to the plurality of first pad terminals, and a plurality of first test lines. The plurality of second pad terminals includes a plurality of sub-pad terminals. One of the plurality of first lines is connected to a first sub-pad terminal of the plurality of sub-pad terminals, and a second sub-pad terminal of the plurality of sub-pad terminals is not connected to any of the plurality of first lines.

A silver-coated particle (P1) is provided. The silver-coated particle (P1) includes a core particle (2) made of a resin particle or an inorganic particle and a silver coating layer (1) formed on a surface of the core particle (2), wherein, an amount of silver contained in the silver coating layer (1) is 5 to 90 parts by mass with respect to 100 parts of the silver-coated particle (P1), a crystallite diameter of the silver, which is calculated from a diffraction line obtained by filling a sample holder belonging to an X-ray diffraction apparatus with the silver-coated particle (P1); and irradiating X-ray in a range of 2/=30 to 120 deg., is in a range of 35 nm to 200 nm.

A silver-coated particle (P1) is provided. The silver-coated particle (P1) includes a core particle (2) made of a resin particle or an inorganic particle and a silver coating layer (1) formed on a surface of the core particle (2), wherein, an amount of silver contained in the silver coating layer (1) is 5 to 90 parts by mass with respect to 100 parts of the silver-coated particle (P1), a crystallite diameter of the silver, which is calculated from a diffraction line obtained by filling a sample holder belonging to an X-ray diffraction apparatus with the silver-coated particle (P1); and irradiating X-ray in a range of 2/=30 to 120 deg., is in a range of 35 nm to 200 nm.

A new formulation of treatment baths for the etching of polymers prior to metallization or coating of the polymer using known technologies described in the state of the art, which are based on the use of salts and/or complexes of the Cr(III) cation, where the formulation includes a salt and/or Cr(III) complex in which the Cr(III) is coordinated to at least one or several mono, bi, tri, tetra, penta, hexadentate or bridging ligands that are coordinated to the chromium by the oxygen, sulfur or nitrogen atom or several of these atoms of the ligands, such that after the polymer piece has been etched with the Etching formulation described above, the metal coating is carried out by means of the application of chemical and electrolyte baths in the case of metallization, or by means of the application of paint or another organic coating.

A new formulation of treatment baths for the etching of polymers prior to metallization or coating of the polymer using known technologies described in the state of the art, which are based on the use of salts and/or complexes of the Cr(III) cation, where the formulation includes a salt and/or Cr(III) complex in which the Cr(III) is coordinated to at least one or several mono, bi, tri, tetra, penta, hexadentate or bridging ligands that are coordinated to the chromium by the oxygen, sulfur or nitrogen atom or several of these atoms of the ligands, such that after the polymer piece has been etched with the Etching formulation described above, the metal coating is carried out by means of the application of chemical and electrolyte baths in the case of metallization, or by means of the application of paint or another organic coating.

A display device includes a display substrate including a display area and a pad region, a first pad portion including a plurality of first pad terminals, the plurality of first pad terminals being arranged in a first direction, and a printed circuit board (PCB) including a base film and a second pad portion. The second pad is electrically connected to the first pad portion. The second pad portion includes a plurality of second pad terminals electrically connected to the plurality of first pad terminals, and a plurality of first test lines. The plurality of second pad terminals includes a plurality of sub-pad terminals. One of the plurality of first lines is connected to a first sub-pad terminal of the plurality of sub-pad terminals, and a second sub-pad terminal of the plurality of sub-pad terminals is not connected to any of the plurality of first lines.

A display device includes a display substrate including a display area and a pad region, a first pad portion including a plurality of first pad terminals, the plurality of first pad terminals being arranged in a first direction, and a printed circuit board (PCB) including a base film and a second pad portion. The second pad is electrically connected to the first pad portion. The second pad portion includes a plurality of second pad terminals electrically connected to the plurality of first pad terminals, and a plurality of first test lines. The plurality of second pad terminals includes a plurality of sub-pad terminals. One of the plurality of first lines is connected to a first sub-pad terminal of the plurality of sub-pad terminals, and a second sub-pad terminal of the plurality of sub-pad terminals is not connected to any of the plurality of first lines.

A laminate comprising a substrate; and a plating-forming layer disposed on at least one surface of both surfaces of the substrate and containing a thermoplastic resin and a plating catalyst, wherein the plating-forming layer further satisfies conditions of the following (1) and/or (2), (1) the plating-forming layer contains a dispersing agent for dispersing the plating catalyst (2) an abundance of the plating catalyst on a surface side of the plating-forming layer is higher than an abundance of the plating catalyst on the substrate side of the plating-forming layer.

A laminate comprising a substrate; and a plating-forming layer disposed on at least one surface of both surfaces of the substrate and containing a thermoplastic resin and a plating catalyst, wherein the plating-forming layer further satisfies conditions of the following (1) and/or (2), (1) the plating-forming layer contains a dispersing agent for dispersing the plating catalyst (2) an abundance of the plating catalyst on a surface side of the plating-forming layer is higher than an abundance of the plating catalyst on the substrate side of the plating-forming layer.

A new formulation of treatment baths for the etching of polymers prior to metallization or coating of the polymer using known technologies described in the state of the art, which are based on the use of salts and/or complexes of the Cr(III) cation, where the formulation includes a salt and/or Cr(III) complex in which the Cr(III) is coordinated to at least one or several mono, bi, tri, tetra, penta, hexadentate or bridging ligands that are coordinated to the chromium by the oxygen, sulfur or nitrogen atom or several of these atoms of the ligands, such that after the polymer piece has been etched with the Etching formulation described above, the metal coating is carried out by means of the application of chemical and electrolyte baths in the case of metallization, or by means of the application of paint or another organic coating.