Ribbon and Foil

High quality Solder Ribbon and Foil manufactured by Indium Corporation is available in many standard alloys and sizes. Material can also be custom made to your unique material and dimensional requirements.

Solder Ribbon is supplied in continuous lengths and is packaged on spools. Solder Foil is supplied in sheet form.

Ribbon Dimensions

Whether you are looking for large quantities of Solder Ribbon in specific widths and thicknesses for automatic die bonding, or a few feet to do testing, Indium Corporation can accommodate your needs.

Our capabilities allow us to manufacture widths as small as .020" (.5mm) and up to 3" (76mm). Thicknesses range from .001" (.025mm) up to as thick as your application requires. All dimensions are dependent on the properties of the metals involved.

We can work with you on your specific dimensional requirements. Our typical tolerances are:

Width
Up to .099" (2.5mm)	+/-.010" (.254mm)
.100" to .999" (2.54mm to 25.37mm)	+/-.025" (.635mm)
Over 1.00" (25.4mm)	+/-.040" (1.01mm)
Thickness
Up to .001" (.025mm)	±.0002" (.005mm)
.001" (.025mm) to .002" (.050mm)	±.0003 (.0076mm)
>.002" (.050mm) to .010" (.254mm)	±.0005" (.0127mm)
>.010" (.254mm) to .020" (.508mm)	±.0010" (.0254mm)
> .020" (.508mm) to .050" (1.27mm)	±.0025" (.0635mm)
>.050" (1.27mm)	±5%

Shelf Life

The shelf life of solder preforms is dependent on the alloy composition. Pb-free alloys, and alloys with lead content of less than 70%, have a shelf life of one year from the date of manufacture (DOM). Alloys with lead content >70% have a shelf life of six months from the DOM.

Foil Dimensions

For applications requiring material wider than 3", we make solder foil sheets in sizes up to 144 square inches. We also can custom-cut sheets in larger sizes or special shapes.

Standard tolerances on foil dimensions are +/-.062" (1.57mm) on the width and the length and +/- .001" (.025mm) on the thickness.

Available Materials

Whether you require pure metal such as indium, tin, gold, lead, etc. or an alloy, we can accomodate your needs. Indium Corporation has over 200 standard pure metals and alloys available, or we can design an alloy just for you. In addition, our standard alloy list includes a large selection of lead-free alloys.

Several of our more popular alloys are listed below. If you don’t see what you need, try our Solder Alloy Selector Guide to see what alloys will suit your needs.

Liquidus (°C/°F)	Solidus (°C/°F)	Indalloy® Number	Comp- osition	Plastic Range (°C/°F)	Mass Density (gm/ cm3)	Electrical Cond. (% of Cu)	Thermal Cond. W/cm°C @ 85°C	Thermal Coef. of Expan- sion µ in/in°C @ 20°C	Tensile Strength (PSI)	Bond Holding Strength (Shear) (PSI)
118/244	118/244	1E	52In 48Sn	Eutectic	7.30	11.70	0.34	20.0	1720	1630
138/281	138/281	281	58Bi 42Sn	Eutectic	8.56	4.5	0.19	15.0	8000	500
143/290	143/290	290	97In 3Ag	Eutectic	7.38	23.00	0.73	22.0	800	-
154/309	149/300	2	80In 15Pb 5Ag	5/9	7.85	13.00	0.43	28.0	2550	2150
157/315	157/315	4	100In	Melting Point	7.31	24.00	0.86	29.0	273	890
167/333	154/309	9	70Sn 18Pb 12In	13/24	7.79	12.20	0.45	24.0	5320	4190
175/347	165/329	204	70In 30Pb	10/18	8.19	8.80	0.38	28.0	3450	-
179/354	179/354	SN62	62Sn 36Pb 2Ag	Eutectic	8.41	11.90	0.50	27.0	7000	7540
181/358	173/343	205	60In 40Pb	8/15	8.52	7.00	0.29	27.0	4150	-
183/361	183/361	SN63	63Sn 37Pb	Eutectic	8.40	11.50	0.50	25.0	7500	6200
210/410	184/363	7	50In 50Pb	26/47	8.86	6.00	0.22	27.0	4670	2680
221/430	221/430	121	96.5Sn 3.5Ag	Eutectic	7.36	16.00	0.33	30.2	5620	-
232/450	232/450	128	100Sn	Melting Point	7.28	15.60	0.73	24.0	1900	-
260/500	240/464	10	75Pb 25In	20/36	9.97	4.60	0.18	26.0	5450	3520
280/536	280/536	182	80Au 20Sn	Eutectic	14.51	-	0.57	16.0	40000	40000
356/673	356/673	183	88Au 12Ge	Eutectic	14.67	-	0.44	13.0	26825	26825
1064/ 1948	1064/ 1948	200	100Au	Melting Point	19.30	73.4	3.18	14.0	18000- 20000

Storage

Store Solder Ribbon and Foil in the original container, closed securely, in 55%RH or less and at temperatures less than 22°C. It can also be stored in an inert atmosphere, such as a nitrogen dry box.

Packaging

We have developed standard packaging for various alloys and ribbon widths. However, if you have specialized needs such as spool size, quantity per spool, or other requirements, we can meet your unique specifications.

Each order can be shipped with a Certificate of Analysis which includes information on metallic impurities. We can also provide a Certificate of Conformance when Solder Ribbon and Foil is made to customer specifications.