A transfer sheet of the present invention includes a resin film having a glass transition temperature of not lower than 60.degree. C., a silicone resin layer formed on the resin film, and a metal wiring pattern formed on the silicone resin layer. The metal wiring pattern has an exposed face that forms a roughened face, and the roughened face has a ten-point average surface roughness (Rz) of 2 .mu.m or more, while a face of the wiring pattern, which is in contact with the silicone resin layer, has a surface roughness (Rz) lower than that of the exposed face. Thereby, the present invention provides a transfer sheet that has improved transfer performance for enabling transferring at low temperature, and improved dimensional stability and also a via-connection reliability. The present invention provides also a wiring board using the transfer sheet and a method of manufacturing the same.
A method of manufacture of an electronic substrate, having a process of embedding electronic components in a substrate, and a process of ejecting liquid droplets containing a conductive material, to form a wiring pattern connected to the external connection electrodes of the electronic components embedded in the substrate.
