An apparatus, system, and method for in-situ three-dimensional (3D) thin-film capacitor (TFC) are provided. A 3D TFC can include a glass core, a through glass via (TGV) in the glass core including first conductive material, the first conductive material forming a first electrode of the 3D MIM capacitor, a second conductive material acting as a second electrode of the 3D MIM capacitor, and a dielectric material in contact with the first and second conductive materials, the dielectric material extending vertically and horizontally and physically separating the first and second conductive materials.