HIST-7300 is the chemical roughening agent for multi-layer process which is developed as alternative to black oxide treatment process. It provides strong adhesion between resin and copper surface.

Features

• Applicable for any substrate materials (No haloing can be seen).
• Superior characteristics for Heat-resistance (in Soldering) and Adhesion (Peel strength).
• Applicable for both horizontal and vertical treatment.

Items	Conditions	Units	Black Oxide	HIST−7300 Etchinng
Peel Strength	Cu35μm/FR-4	kN/m	0.8~1.4	0.8~1.3
Haloing	18%HCl, 3h Dip	−	Occuring	None
Thermal Stress Test	260ºC/20s, CSolder Dip	−	Pass	Pass
	288ºC/10s, 3cycles, Solder Dip	−	Pass	Pass
Insulation Resistance	85ºC 85% RH/100V/1000h	(Ω)	>109	>109
Storage Life	−	days	<3	<7

	Surface Condition after Etching by SEM (×20000)
	Cross Section after Etching by FIB (×20000)

Applications

• Inner layer copper surface roughening for Multilayer PWBs