Here, in a certain high density interconnect (HDI) printed circuit board, the effect of copper sulfate and sulfuric acid on the filling effect of a blind hole with a certain diameter and depth was investigated by making a blind hole using a CO₂ laser drilling machine, filling the blind hole via electroplating by simulating the electroplating line in a Halin cell, and observing the cross-section of a micro blind hole after polishing using metallographic microscope, as well as the effect of hole filling, are evaluated. The results show that, under the conditions of a certain plating solution formula and electroplating parameters (current density and electroplating time), the sag degree decreases with the increase in the copper sulfate concentration. When the concentration of copper sulfate increases from 210 g/L to 225 g/L, the filling effect is good and the sag degree is about 0. However, with the increase in sulfuric acid concentration, the sag increases gradually. When the sulfuric acid concentration is 25–35 g/L, both the sag and copper coating thickness are in a small range. Under appropriate electroplating conditions, a better blind hole filling effect can be obtained. The volume of blind hole has a certain effect on the diffusion and exchange of copper sulfate and sulfuric acid, as well as on the concentration distribution of additives.

A larger x _p of M in MB _x causes a lower peak temperature but almost doesn't affect the initial temperature during the dehydrogenation of LiBH ₄ .

Li₂B₁₂H₁₂ is commonly considered as a boron sink hindering the reversible hydrogen sorption of LiBH₄. Recently, in the dehydrogenation process of LiBH₄ an amorphous H-deficient Li₂B₁₂H_12−x phase was observed. In the present study, we investigate the rehydrogenation properties of Li₂B₁₂H_12−x to form LiBH₄. With addition of nanostructured cobalt boride in a 1:1 mass ratio, the rehydrogenation properties of Li₂B₁₂H_12−x are improved, where LiBH₄ forms under milder conditions (e.g., 400 °C, 100 bar H₂) with a yield of 68%. The active catalytic species in the reversible sorption reaction is suggested to be nonmetallic Co_xB (x = 1) based on ¹¹B MAS NMR experiments and its role has been discussed.

A LiBH₄–H₃BO₃ destabilization system shows significantly lower temperature, rapid kinetics, pure hydrogen and high capacity through [BH₄]⁻⋯[OH]⁻ interaction.

SiB₄ was unexpectedly found to exhibit dual roles to enhance the hydrogen storage performance of LiBH₄.